Tokushima University / Educator and Researcher Directory --- Takeuchi, Masaki

Personal Web Page

https://researchmap.jp/masaki.takeuchi (researchmap)

Field of Study

○	Analytical Chemistry

Subject of Study

○	Analysis of substance in the atmospheric environment (air pollutant, on-site analysis, automated analysis, chromatography)

Book / Paper

Book:

1.	Masaki Takeuchi and 大河内博 : 富士山測候所のはなし日本一高いところにある研究施設, 成山堂書店, Tokyo, Jul. 2022.
2.	Shigeru Sugiyama, Toshihiro Moriga, Masahiro Katoh, Kei-ichiro Murai, Toshihide Horikawa, Naohiro Shimoda, Akihiro Furube, Shin-ichiro Yanagiya, Masamichi Ogasawara, Takashi Yamamoto, Yoshitoshi Nakamura, Chikako Asada, Chizuru Sasaki, Hideji TANAKA, Masaki Takeuchi, Yutaka Taketani, Hisami Okumura, Masashi Masuda and Toshihiro Okamoto : 枯渇資源と技術開発, 徳島大学産業院出版部, Tokushima, Mar. 2020. (Summary) 2017年度から徳島大学重点クラスター``人類の恒久的繁栄に向けた対枯渇資源対応技術の開発''として活動した成果を，一般の読者にもわかりやすいように公表した徳島大学産業院出版部から始めて出版した書籍である．
3.	Hideji TANAKA and Masaki Takeuchi : わかりやすい機器分析学，第4版, 株式会社廣川書店, Tokyo, Mar. 2018.
4.	Hideji TANAKA and Masaki Takeuchi : クリスチャンExcelで解く分析化学, 丸善出版, Tokyo, Mar. 2017.
5.	Hideji TANAKA and Masaki Takeuchi : クリスチャン分析化学, 原書7版, 丸善出版, Tokyo, Jan. 2017.
6.	Hideji TANAKA and Masaki Takeuchi : スタンダード薬学シリーズII 2, 物理系薬学 III. 機器分析・構造決定, Tokyo Kagaku Dozin C., Ltd., Tokyo, Nov. 2016.
7.	Hideji TANAKA and Masaki Takeuchi : 基礎分析化学, 株式会社廣川書店, Tokyo, Jan. 2016.
8.	Hideji TANAKA and Masaki Takeuchi : 薬学分析科学の最前線, (株)じほう, Tokyo, Mar. 2009.

Academic Paper (Judged Full Paper):

1.	Olbemo Kebede Selass, Masaki Takeuchi and Hideji TANAKA : Digital-movie-based flow colorimetry for pH measurement with universal indicators, Talanta Open, Vol.9, Articlenumber100279, 2024. (Keyword) pH / Digital movie based colorimetry / Universal indicator / RGB / Hue (Tokushima University Institutional Repository) ● Metadata: 119007 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talo.2023.100279 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.talo.2023.100279 (Tokushima University Institutional Repository: 119007, DOI: 10.1016/j.talo.2023.100279)
2.	Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Norio Teramae, William Pipkin, Kazuko Matsui, Atsushi Watanabe and Chuichi Watanabe : Direct analysis of airborne microplastics collected on quartz filters by pyrolysis-gas chromatography/mass spectrometry, Journal of Analytical and Applied Pyrolysis, Vol.171, 105946, 2023. (Tokushima University Institutional Repository) ● Metadata: 118027 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jaap.2023.105946 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.jaap.2023.105946 (Tokushima University Institutional Repository: 118027, DOI: 10.1016/j.jaap.2023.105946)
3.	Nishimura Madoka, Nakaya Yukari, Kashimoto Mao, Shoji Imai, Hideji TANAKA and Masaki Takeuchi : Determination of trace perchlorate in river water by ion chromatography with online matrix removal and sample concentration, Analytical Sciences, 2023. (Summary) This paper proposes a simple ion chromatographic approach to determine trace amounts of perchlorate in river water samples. Determination of the trace perchlorate by ion chromatography typically faces two challenges: interference by matrix ions such as chloride, nitrate, and sulfate in the samples and insufficient detection sensitivity. In the present study, online pretreatment of the samples with an OnGuard II Ba/Ag/H disposable sample pretreatment cartridge prevented the sulfate peak tailing from overlapping with the perchlorate peak on the chromatogram. In addition, the matrix removal enabled as large as 10 mL of sample to be loaded into a high exchange capacity anion concentrator, significantly improving perchlorate's detection sensitivity. The proposed approach achieved a detection limit (S/N = 3) of 0.046 µg L without using a costly mass spectrometer and successfully determined sub µg L levels of perchlorate in river water. (Tokushima University Institutional Repository) ● Metadata: 117910 (Link to Publication Site) ● Publication site (DOI): 10.1007/s44211-022-00262-9 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 36635453 ● Search Scopus @ Elsevier (PMID): 36635453 ● Search Scopus @ Elsevier (DOI): 10.1007/s44211-022-00262-9 (Tokushima University Institutional Repository: 117910, DOI: 10.1007/s44211-022-00262-9, PubMed: 36635453)
4.	Wang Yize, Okochi Hiroshi, Tani Yuto, Hayami Hiroshi, Minami Yukiya, Katsumi Naoya, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Kajino Mizuo, Adachi Koji, Ishihara Yasuhiro, Iwamoto Yoko and Niida Yasuhiro : Airborne hydrophilic microplastics in cloud water at high altitudes and their role in cloud formation, Environmental Chemistry Letters, Vol.21, 3055-3062, 2023.
5.	Masaki Takeuchi, Shinya Nakagawa, Hiroki Watanabe, Hideji TANAKA, Takaharu Isobe, Hiroko Ogata and Hiroshi Okochi : Practical usefulness of observing the free tropospheric acidic gases with a parallel plate wet denuder coupled ion chromatograph, Atmospheric Environment: X, Vol.18, 100213, 2023. (Tokushima University Institutional Repository) ● Metadata: 118162 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.aeaoa.2023.100213 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.aeaoa.2023.100213 (Tokushima University Institutional Repository: 118162, DOI: 10.1016/j.aeaoa.2023.100213)
6.	Maria Shichijo, Kazumasa Okamoto, Toru Takahashi, Miharu Nomura, Shin-ichi Ohira, Hitoshi Mizuguchi, Hideji TANAKA and Masaki Takeuchi : Feedback standard addition method coupled flow injection analysis Validation by spectrophotometric determination of nitrite in seawater, Microchemical Journal, Vol.190, 108721, 2023. (Tokushima University Institutional Repository) ● Metadata: 118161 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.microc.2023.108721 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.microc.2023.108721 (Tokushima University Institutional Repository: 118161, DOI: 10.1016/j.microc.2023.108721)
7.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : Integrated continuous flow method with dual feedback-based controls for online analysis and process control, Analytical Sciences, Vol.39, 2023. (Summary) The concept of an integrated automated continuous flow method with dual feedback controls is presented for diluting a stock solution to provide a solution of a given concentration. The one control is used for the online process monitoring by a feedback-based flow ratiometry, where the product (the diluted liquid) is titrated through the rapid bidirectional scan of the product/reagent flow ratio. The feedback control limits the scanning to the necessary range to increase the analytical throughput. The other control is used for the process control to output the product with a preset concentration. The merging ratio of the stock solution and a solvent (diluent) is changed based on the information from the online analysis. The concept was verified by applying it to producing 0.1 mol dm CHCOOH. When the stock concentration was changed from 0.1 (reference concentration) to 0.3 and then 0.2 mol dm, the system searched for the suitable merging ratio and converged the output concentration to the reference value within 7.43 min with a relative error below 1.05%. The mean throughput rate of the process analysis was 11.2 titrations min. Successful results were also obtained for the 0.1 mol dm HCl production. The present concept could be the basis for process control with reduced wasteful output and effluent treatment with eco-friendly treated water discharge, resulting in the contribution to SDGs' goals of 6 (Clean water and sanitation), 9 (Industry, innovation and infrastructure), and 14 (Life below water). (Tokushima University Institutional Repository) ● Metadata: 119009 (Link to Publication Site) ● Publication site (DOI): 10.1007/s44211-022-00206-3 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 36273392 ● Search Scopus @ Elsevier (PMID): 36273392 ● Search Scopus @ Elsevier (DOI): 10.1007/s44211-022-00206-3 (Tokushima University Institutional Repository: 119009, DOI: 10.1007/s44211-022-00206-3, PubMed: 36273392)
8.	Maria Shichijoh, Ryosuke Niki, 大平慎一, Hitoshi Mizuguchi, Hideji TANAKA and Masaki Takeuchi : Interference of high degrees salt on spectrophotometric flow injection analysis Quantitative error of nitrite from schlieren effect and salt effect, Journal of Flow Injection Analysis, Vol.39, No.1, 3-7, 2022. (Keyword) nitrite / Griess reaction / spectrophotometry / FIA / seawater / schlieren effect / salt effect (Tokushima University Institutional Repository) ● Metadata: 118407 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050580295505945088 (Tokushima University Institutional Repository: 118407, CiNii: 1050580295505945088)
9.	Maria Shichijoh, Hideji TANAKA and Masaki Takeuchi : Noise Reduction Using Fourier Analysis in Microsoft Excel - Improvement of the Signal-to-Noise Ratio in Flow Injection Analysis -, Bunseki Kagaku, Vol.71, No.4.5, 283-287, 2022. (Summary) <p>In flow injection analysis (FIA), the baseline noise of the detection signal is an important parameter that determines the detection sensitivity. In this study, we applied the Fourier analysis/inverse Fourier analysis of Microsoft Excel to the detection signal of FIA to decrease the noise signal. The Fourier analysis of the detection signal for a sample of 0.06 mg L<sup>-1</sup> NO<sub>2</sub><sup>-</sup> showed many frequency components with amplitudes less than 0.04 mV. After removing these frequency components, inverse Fourier analysis was applied, and a smooth detection signal was obtained. Even with a sample of 2.50 mg L<sup>-1</sup> NO<sub>2</sub><sup>-</sup>, the noise signals were successfully removed using the Fourier/inverse Fourier analysis. The signal-to-noise ratio (<i>S/N</i>) of NO<sub>2</sub><sup>-</sup> was improved by ca. 15 times. We concluded that removing noise signals by Fourier analysis effectively improves the S/N of FIA.</p> (Keyword) noise reduction / <i>S/N</i> / FIA / nitrite / Griess reaction / fast Fourier transform / Microsoft Excel (Tokushima University Institutional Repository) ● Metadata: 116934 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.71.283 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390855267545422592 ● Search Scopus @ Elsevier (DOI): 10.2116/bunsekikagaku.71.283 (Tokushima University Institutional Repository: 116934, DOI: 10.2116/bunsekikagaku.71.283, CiNii: 1390855267545422592)
10.	Hideji TANAKA, Riona Wada, Masatoshi Yanase, Erina Tomiyama, Akira Ohbuchi, Keiro Higuchi and Masaki Takeuchi : Triangular-wave controlled amplitude-modulated flow analysis for extending dynamic range to saturated signals, Analytical Sciences, Vol.38, No.5, 795-802, 2022. (Summary) We have applied our amplitude-modulated flow analysis concept to extend the dynamic range to saturated analytical signals. Sample solution, the flow rate F of which is periodically varied with a triangular control signal V, is merged with a reagent solution delivered at a constant flow rate F. While the total flow rate F is kept constant, a diluent with F-(F + F) flow rate is aspirated from the third channel. The analytical signal V obtained downstream is processed by fast Fourier transform to obtain the amplitudes of the wave components in V. When the sample concentration C is low, V shows a triangular profile like V; the sum of the amplitudes ΣA is proportional to C. When C is high, V shows a trapezoidal profile because of the V saturation. A linear calibration curve can also be obtained for such saturated signals by plotting CΣA against C. The proof of the concept is validated by applying it to spectrophotometric determinations of a dye (Methylene Blue) and colored complexes of Fe - phenanthroline and Fe - Tiron. (Tokushima University Institutional Repository) ● Metadata: 116827 (Link to Publication Site) ● Publication site (DOI): 10.1007/s44211-022-00097-4 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 35298795 ● Search Scopus @ Elsevier (PMID): 35298795 ● Search Scopus @ Elsevier (DOI): 10.1007/s44211-022-00097-4 (Tokushima University Institutional Repository: 116827, DOI: 10.1007/s44211-022-00097-4, PubMed: 35298795)
11.	Naoya Kakiuchi, Junya Ochiai, Masaki Takeuchi and Hideji TANAKA : Inner product of RGB unit vectors for detecting color transition: application to feedback-based flow ratiometric titration, Analytical Sciences, Vol.38, No.3, 623-626, 2022. (Summary) The inner product (IP) of RGB unit vectors' approach for detecting color transition has further been applied to a feedback-based flow ratiometric titration, including nonaqueous titration. While the flow ratio of titrand/titrant containing an indicator was varying, the video image of the merged solution was taken with a digital microscope downstream. The indicator's color was converted to an RGB unit vector. The change in IP between vectors was used for determining the equivalence point. The concept was successfully applied to the determinations of drug and vinegar samples with reasonable throughput rate (> 18 s/titration) and precision (RSD < 4.4%). (Keyword) Color / Feedback (Tokushima University Institutional Repository) ● Metadata: 116826 (Link to Publication Site) ● Publication site (DOI): 10.1007/s44211-022-00075-w (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 35286653 ● Search Scopus @ Elsevier (PMID): 35286653 ● Search Scopus @ Elsevier (DOI): 10.1007/s44211-022-00075-w (Tokushima University Institutional Repository: 116826, DOI: 10.1007/s44211-022-00075-w, PubMed: 35286653)
12.	Haruka Tanaka, Makoto Namikawa, Naoya Tomiyasu, Hideji TANAKA and Masaki Takeuchi : Parallel plate wet denuder coupled ammonia transfer device-conductivity detector for near-real-time monitoring of gaseous ammonia, Talanta Open, Vol.5, 100091, 2022. (Tokushima University Institutional Repository) ● Metadata: 116936 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talo.2022.100091 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85123766769 (Tokushima University Institutional Repository: 116936, DOI: 10.1016/j.talo.2022.100091, Elsevier: Scopus)
13.	Masaki Takeuchi, Naoya Tomiyasu, Makoto Namikawa, Hideji TANAKA, Kei Toda, Naoya Katsumi and Hiroshi Okochi : On-line analysis of free-tropospheric water-soluble acidic gases and particulate anions on the summit of Mt. Fuji, Japan, Atmospheric Environment, Vol.273, 118977, 2022. (Tokushima University Institutional Repository) ● Metadata: 116935 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.atmosenv.2022.118977 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85123708407 (Tokushima University Institutional Repository: 116935, DOI: 10.1016/j.atmosenv.2022.118977, Elsevier: Scopus)
14.	Motofumi Suzuki, Atsumi Urabe, Sayaka Sasaki, Ryo Tsugawa, Satoshi Nishio, Haruka Mukaiyama, Yoshiko Murata, Hiroshi Masuda, M. Sann Aung, Akane Mera, Masaki Takeuchi, Keijo Fukushima, Michika Kanaki, Kaori Kobayashi, Yudai Chiba, Binod Babu Shrestha, Hiromi Nakanishi, T. Watanabe, Atsushi Nakayama, Hiromichi Fujino, Takanori Kobayashi, Keiji Tanino, Naoko Nishizawa and Kosuke Namba : Development of a mugineic acid family phytosiderophore analog as an iron fertilizer, Nature Communications, Vol.12, No.1, 1558, 2021. (Summary) Iron (Fe) is an essential nutrient, but is poorly bioavailable because of its low solubility in alkaline soils; this leads to reduced agricultural productivity. To overcome this problem, we first showed that the soil application of synthetic 2'-deoxymugineic acid, a natural phytosiderophore from the Poaceae, can recover Fe deficiency in rice grown in calcareous soil. However, the high cost and poor stability of synthetic 2'-deoxymugineic acid preclude its agricultural use. In this work, we develop a more stable and less expensive analog, proline-2'-deoxymugineic acid, and demonstrate its practical synthesis and transport of its Fe-chelated form across the plasma membrane by Fe(III)·2'-deoxymugineic acid transporters. Possibility of its use as an iron fertilizer on alkaline soils is supported by promotion of rice growth in a calcareous soil by soil application of metal free proline-2'-deoxymugineic acid. (Keyword) Azetidinecarboxylic Acid / Fertilizers / Iron / Siderophores / Soil (Tokushima University Institutional Repository) ● Metadata: 116178 (Link to Publication Site) ● Publication site (DOI): 10.1038/s41467-021-21837-6 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 33692352 ● Search Scopus @ Elsevier (PMID): 33692352 ● Search Scopus @ Elsevier (DOI): 10.1038/s41467-021-21837-6 (Tokushima University Institutional Repository: 116178, DOI: 10.1038/s41467-021-21837-6, PubMed: 33692352)
15.	Hideji TANAKA, Kurokawa Yohei, Masaki Takeuchi and Akira Ohbuchi : Amplitude modulated flow analysis for speciationProof of concept by quantification of Fe2+ and Fe3+ ions, Talanta Open, Vol.3, Article100031, 2021. (Keyword) flow analysis / flow rate modulation / fast Fourier transform / speciation / amplitude modulation (Tokushima University Institutional Repository) ● Metadata: 116472 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talo.2021.100031 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.talo.2021.100031 (Tokushima University Institutional Repository: 116472, DOI: 10.1016/j.talo.2021.100031)
16.	Kakiuchi Naoya, Ochiai Junya, Masaki Takeuchi and Hideji TANAKA : Inner Product of RGB Unit Vectors for Simple and Versatile Detection of Color Transition, Analytical Sciences, Vol.37, No.1, 3-5, 2021. (Tokushima University Institutional Repository) ● Metadata: 116828 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.20C015 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.20C015 (Tokushima University Institutional Repository: 116828, DOI: 10.2116/analsci.20C015)
17.	Kaho Maeda, Haruka Tanaka, Riona Wada, 大河内博, 戸田敬, Hideji TANAKA and Masaki Takeuchi : On-line collector for water-soluble atmospheric particulate matter compatible with a parallel plate wet denuder, Earozoru Kenkyu, Vol.36, No.4, 273-278, 2021. (Tokushima University Institutional Repository) ● Metadata: 116866 (Link to Publication Site) ● Publication site (DOI): 10.11203/jar.36.273 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390290493076984064 ● Search Scopus @ Elsevier (DOI): 10.11203/jar.36.273 (Tokushima University Institutional Repository: 116866, DOI: 10.11203/jar.36.273, CiNii: 1390290493076984064)
18.	Tohru Takahashi, Mayu Watanabe, Yuta Ohtsuka, Hideji TANAKA and Masaki Takeuchi : Rapid flow injection analysis by partial least squares regression -Validation by a spectrophotometric determination of iron with 1,10-phenanthroline-, Bunseki Kagaku, Vol.70, No.7,8, 451-457, 2021. (Tokushima University Institutional Repository) ● Metadata: 116865 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.70.451 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85117135483 (Tokushima University Institutional Repository: 116865, DOI: 10.2116/bunsekikagaku.70.451, Elsevier: Scopus)
19.	Hiroki Watanabe, Jun Sugiura, Hideji TANAKA, Petr Kubáň and Masaki Takeuchi : Miniaturized low-pressure ion-exchange module and its application to an acidic eluent generator for open tubular ion chromatography, Journal of Flow Injection Analysis, Vol.38, No.1, 11-14, 2021. (Summary) We describe a miniaturized eluent generator (MEG), which can be integrated into open tubular capillary column ion chromatography (OTCC-IC). The MEG consists of one central eluent channel and two feed acid chambers, with each phase isolated by a cation-exchange membrane (CEM) and an anion-exchange membrane (AEM). Pure water flowed through the central eluent channel while acid solution (HA) was fed to both chambers. Applying the electric field to the MEG, H+ and A- simultaneously and respectively through the CEM and AEM to form HA in the central channel. The MEG successfully produced tartaric acid and 2,6-pyridinedicarboxylic acid as the eluent for cation OTCC-IC. The gradient elution improved the peak resolution and analytical window for five common cations (Na+, NH4+, K+, Ca2+, Mg2+). (Keyword) Ion-exchange membrane / electrolysis / ion chromatography / eluent generation / open tubular capillary column (Tokushima University Institutional Repository) ● Metadata: 116864 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.38.1_11 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390852359475937664 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.38.1_11 (Tokushima University Institutional Repository: 116864, DOI: 10.24688/jfia.38.1_11, CiNii: 1390852359475937664)
20.	Masaki Takeuchi, Makoto Namikawa, Kazumasa Okamoto, Tatsuya Oda, Haruka Tanaka, 大河内博, 戸田敬, 三浦和彦 and Hideji TANAKA : Online Analysis of Water-soluble Acidic Gases and Anions in Particles at the Southeastern Foot of Mt. Fuji, Bunseki Kagaku, Vol.70, No.1-2, 65-69, 2021. (Summary) <p>During the summer of 2018, we monitored the concentrations of water-soluble acid gases and particulate anions at the southeastern foot (1284 m a.s.l.) of Mt. Fuji, Japan, using gas/particle-ion chromatographs. All samples analyzed contained quantifiable levels of anions. The average concentrations of acid gas and particulate anion concentrations were, respectively, 1.10±0.37 nmol m<sup>-3</sup> for HCl, 3.49±1.72 nmol m<sup>-3</sup> for HONO, 1.23±0.59 nmol m<sup>-3</sup> for HNO<sub>3</sub>, 0.33±0.20 nmol m<sup>-3</sup> for SO<sub>2</sub>, 3.61±3.69 nmol m<sup>-3</sup> for Cl<sup>-</sup>, 0.65±0.22 nmol m<sup>-3</sup> for NO<sub>2</sub><sup>-</sup>, 4.29±2.98 nmol m<sup>-3</sup> for NO<sub>3</sub><sup>-</sup>, and 4.47±3.57 nmol m<sup>-3</sup> for SO<sub>4</sub><sup>2-</sup>. We found that the concentration of soluble acidic gases increased during the daytime, while no characteristic diurnal patterns were observed in the particulate anions.</p> (Keyword) air pollutant / denuder / particle collector / ion chromatograph / online analysis / Mt. Fuji (Tokushima University Institutional Repository) ● Metadata: 116423 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.70.65 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390569070681097600 ● Search Scopus @ Elsevier (DOI): 10.2116/bunsekikagaku.70.65 (Tokushima University Institutional Repository: 116423, DOI: 10.2116/bunsekikagaku.70.65, CiNii: 1390569070681097600)
21.	Yuta Otsuka, Akira Ito, Masaki Takeuchi, Suvra Pal and Hideji TANAKA : Predictive evaluation of powder X-ray diffractogram of pharmaceutical formulation powders based on infrared spectroscopy, Bio-Medical Materials and Engineering, Vol.31, No.5, 307-317, 2020. (Summary) To ensure quality and stability, monitoring systems are recommended to analyze pharmaceutical manufacturing processes. This study was performed to predict powder X-ray diffraction (PXRD) patterns of formulation powders through attenuated total reflectance (ATR)-infrared (IR) spectroscopy in a nondestructive manner along with chemometrics. Caffeine anhydrate, acetaminophen, and lactose monohydrate were grinded at six weight ratios. The six sample groups were evaluated using ATR-IR spectroscopy and PXRD analysis. Partial least squares models were constructed to predict the PXRD intensities of the samples from the ATR-IR spectra. The prediction accuracy on the prepared PLS regression models was as high as R2 = 0.993. Linear relationships were obtained between the prediction data set and reference PXRD intensity at each degree. 2D PLS regression coefficient analysis enabled the analysis of the correlation between PXRD patterns and IR spectra. (Link to Publication Site) ● Publication site (DOI): 10.3233/BME-206003 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 32894235 ● Search Scopus @ Elsevier (PMID): 32894235 ● Search Scopus @ Elsevier (DOI): 10.3233/BME-206003 (DOI: 10.3233/BME-206003, PubMed: 32894235)
22.	Kazumasa Okamoto, Serika Okabe, Hideji TANAKA and Masaki Takeuchi : 軸方向分散を抑えた陽イオン交換モジュールとイオンクロマトグラフィーへの応用, Journal of Flow Injection Analysis, Vol.37, No.1, 3-8, 2020. (Tokushima University Institutional Repository) ● Metadata: 115180 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.37.1_3 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390003825204586112 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.37.1_3 (Tokushima University Institutional Repository: 115180, DOI: 10.24688/jfia.37.1_3, CiNii: 1390003825204586112)
23.	Ochiai Junya, Oka Sawako, Hirasaka Tomoko, Tomiyama Erina, Kubo Hiroya, Okamoto Kazumasa, Masaki Takeuchi and Hideji TANAKA : Introduction of Air-Segmentation Approach to Flow Titration by Feedback-based and Subsequent Fixed Triangular Wave-controlled Flow Ratiometry, Analytical Sciences, Vol.36, No.6, 703-708, 2020. (Summary) An air-segmentation approach has been introduced to a feedback-based and subsequent fixed triangular wave-controlled flow ratiometry to suppress axial dispersion in flow titration. The flow rate of a base solution containing an indicator is linearly varied with a control signal, V, supplied by a computer. The solution is merged with an acid solution under a constant total flow rate. Air is introduced to the merged solution in order to segment the solution with air bubbles. Both phases are led to a UV/Vis detector without phase separation. Air signals are removed by signal processing. The effect of the lag time between the merging of solutions upstream and the sensing of the corresponding signal downstream is offset by feedback-based upward and downward V scans, and thus the V that gives the equivalence composition is determined. Subsequently, fixed triangular wave control is applied to a narrower V range with a higher scan rate to enhance the throughput rate (maximally 11.8 titrations/min). Air-segmentation has been found to be effective to reduce axial dispersion and to preserve the titrand/titrant composition upon their just being merged. Consequently, the applicable range is extended especially to lower titrand concentration. The proposed method has been successfully applied to various acid-base titrations, including the nonaqueous titration of the Japanese Pharmacopoeia drug. (Keyword) flow titration / flow ratiometry / air-segmentation / feedback control (Tokushima University Institutional Repository) ● Metadata: 116829 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.19P401 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 31866608 ● Summary page in Scopus @ Elsevier: 2-s2.0-85086346875 (Tokushima University Institutional Repository: 116829, DOI: 10.2116/analsci.19P401, PubMed: 31866608, Elsevier: Scopus)
24.	Hitoshi Mizuguchi, Nishimori Daichi, Tomohiko Kuwabara, Masaki Takeuchi, Iiyama Masamitsu and Toshio Takayanagi : Track-etched membrane-based dual-electrode coulometric detector for microbore/capillary high-performance liquid chromatography, Analytica Chimica Acta, Vol.1102, 46-52, 2020. (Tokushima University Institutional Repository) ● Metadata: 114099 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.aca.2019.12.045 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85076850164 (Tokushima University Institutional Repository: 114099, DOI: 10.1016/j.aca.2019.12.045, Elsevier: Scopus)
25.	山脇拓実, 大河内博, 山本修司, 山之越恵理, 島田幸治郎, 緒方裕子, 勝見尚也, 皆巳幸也, 加藤俊吾, 三浦和彦, 戸田敬, 和田龍一, Masaki Takeuchi, 小林拓, 土器屋由紀子 and 畠山史郎 : 富士山体を用いた夏季自由対流圏における雲水中揮発性有機化合物の観測, Journal of Japan Society for Atmospheric Environment, Vol.55, No.5, 191-203, 2020. (Tokushima University Institutional Repository) ● Metadata: 116768 (Link to Publication Site) ● Publication site (DOI): 10.11298/taiki.55.191 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390566775160981632 ● Search Scopus @ Elsevier (DOI): 10.11298/taiki.55.191 (Tokushima University Institutional Repository: 116768, DOI: 10.11298/taiki.55.191, CiNii: 1390566775160981632)
26.	Yuta Otsuka, Hiroki Watanabe, Hideji TANAKA and Masaki Takeuchi : Quantification of overlapped peaks with partial least squares regression: Open tubular ion chromatography for sodium and ammonium ions, Journal of Flow Injection Analysis, Vol.37, No.2, 73-77, 2020. (Tokushima University Institutional Repository) ● Metadata: 116767 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.37.2_73 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.37.2_73 (Tokushima University Institutional Repository: 116767, DOI: 10.24688/jfia.37.2_73)
27.	Yuta Otsuka, Akira Ito, Masaki Takeuchi, Tetsuo Sasaki and Hideji TANAKA : Effects of temperature on terahertz spectra of caffeine/oxalic acid 2:1 cocrystal and its solid-state density functional theory, Journal of Drug Delivery Science and Technology, Vol.56, No.7, 101215, 2020. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jddst.2019.101215 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.jddst.2019.101215 (DOI: 10.1016/j.jddst.2019.101215)
28.	Aiko Miyazaki, Naoya Kakiuchi, Kazumasa Okamoto, Masaki Takeuchi and Hideji TANAKA : Unprecedented High Throughput Titration by Feedback-Based and Subsequent Fixed Triangular Wave-Controlled Flow Ratiometry and Its Application to Quantification of Japanese Pharmacopoeia Drugs, Journal of Flow Injection Analysis, Vol.36, No.2, 97-100, 2019. (Tokushima University Institutional Repository) ● Metadata: 115181 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.36.2_97 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390846609815113344 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.36.2_97 (Tokushima University Institutional Repository: 115181, DOI: 10.24688/jfia.36.2_97, CiNii: 1390846609815113344)
29.	Akira Ito, Yuta Otsuka, Masaki Takeuchi and Hideji TANAKA : Mechanochemical synthesis of zinc chloroapatite and evaluation of its crystallinity by attenuated total reflection - infrared spectroscopy and principal component analysis, Phosphorus Research Bulletin, Vol.35, 16-22, 2019. (Link to Publication Site) ● Publication site (DOI): 10.3363/prb.35.16 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001288156525952 ● Search Scopus @ Elsevier (DOI): 10.3363/prb.35.16 (DOI: 10.3363/prb.35.16, CiNii: 1390001288156525952)
30.	Otsuka Yuta, Ito Akira, Takahashi Toru, Matsumura Saki, Masaki Takeuchi and Hideji TANAKA : Bilayer tablet dissolution kinetics based on a degassing cyclic flow UV-vis spectroscopy with chemometrics, Chemical & Pharmaceutical Bulletin, Vol.67, No.4, 361-366, 2019. (Summary) Dissolution kinetics of a bilayer direct compress tablet was evaluated by using degassing cyclic flow UV-visible (Vis) spectroscopy with chemometrics. The model bilayer nicotinamide (NA)-pyridoxine hydrochloride (PH) 100.0 mg tablets were prepared via the dual compress method. The fast diffusion layer of the bilayer tablet contained nicotinamide, microcrystal cellulose, beta-lactose, magnesium stearate, and croscarmellose sodium. The slow release layer contained pyridoxine hydrochloride and carnauba wax. The monolayer direct compress tablets were prepared as dual ingredient (API)s formulation tablets. The degassing cyclic flow UV-Vis spectroscopy dissolution test was carried out using the prepared tablets. The dissolution test conditions were as follows: time, 60 min; temperature, 37°C; paddle method, 50 rpm, and UV-Vis spectra measurement 1 time/min. The UV-Vis spectra of the flow solution were measured in the range of 240-380 nm. API concentration was predicted by partial least squares (PLS) regression models based on UV-Vis spectra. The dissolution kinetics of the bilayer and monolayer tablets were evaluated based on the UV-Vis spectra with the predicted API concentration profile. The degassing flow system could prevent air bubbles in the flow cell at 1800 min. Therefore, simultaneous determination of NA and PH concentration based on the PLS regression was suggested to have high accuracy. PLS regression has advantages over the conventional λ absorbance method of simultaneous determination. We found that the kinetics of the separated bilayer tablet can be evaluated by the same kinetic analysis method used for the single layer model tablet. (Keyword) Drug Compounding / Drug Liberation / Hydrogen-Ion Concentration / Kinetics / Least-Squares Analysis / Models, Chemical / Niacinamide / Pyridoxine / Solubility / Spectrophotometry / Tablets / Temperature (Link to Publication Site) ● Publication site (DOI): 10.1248/cpb.c18-00867 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30930440 ● Summary page in Scopus @ Elsevier: 2-s2.0-85063988866 (DOI: 10.1248/cpb.c18-00867, PubMed: 30930440, Elsevier: Scopus)
31.	Otsuka Yuta, Ito Akira, Pal Suva, Mitome Hajime, Masaki Takeuchi and Hideji TANAKA : Prediction of differential scanning calorimetry curve of theophylline direct compression model tablet using Raman spectra, Journal of Drug Delivery Science and Technology, Vol.49, 254-259, 2019. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jddst.2018.11.003 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85057888846 (DOI: 10.1016/j.jddst.2018.11.003, Elsevier: Scopus)
32.	Otsuka Yuta, Ito Akira, Masaki Takeuchi and Hideji TANAKA : Effect of amino acid on calcium phosphate phase transformation: attenuated total reflectance-infrared spectroscopy and chemometrics, Colloid and Polymer Science, Vol.297, No.1, 155-163, 2019. (Link to Publication Site) ● Publication site (DOI): 10.1007/s00396-018-4438-0 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85058508010 (DOI: 10.1007/s00396-018-4438-0, Elsevier: Scopus)
33.	Naoya Katsumi, Shuhei Miyake, Hiroshi Okochi, Yukiya Minami, Hiroshi Kobayashi, Shungo Kato, Ryuichi Wada, Masaki Takeuchi, Kei Toda and Kazuhiko Miura : Humic-Like Substances Global Levels and Extraction Methods in Aerosols, Environmental Chemistry Letters, Vol.17, 1023-1029, 2019. (Link to Publication Site) ● Publication site (DOI): 10.1007/s10311-018-00820-6 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/s10311-018-00820-6 (DOI: 10.1007/s10311-018-00820-6)
34.	Masaki Takeuchi, Miharu Nomura, Maria Shichijo and Hideji TANAKA : Flow injection analysis of nitrite nitrogen in seawater introducing standard addition method, Journal of Flow Injection Analysis, Vol.35, No.2, 59-61, 2018. (Keyword) Nitrite / seawater / flow injection analysis / standard addition method (Tokushima University Institutional Repository) ● Metadata: 114307 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.35.2_59 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390845702323137536 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.35.2_59 (Tokushima University Institutional Repository: 114307, DOI: 10.24688/jfia.35.2_59, CiNii: 1390845702323137536)
35.	Kasumi Mitsuishi, Masakazu Iwasaki, Masaki Takeuchi, Hiroshi Okochi, Shungo Kato, Shin-Ichi Ohira and Kei Toda : Diurnal variations in partitioning of atmospheric glyoxal and methylglyoxal between gas and particles at the ground level and in the free troposphere, ACS Earth & Space Chemistry, Vol.2, No.9, 915-924, 2018. (Link to Publication Site) ● Publication site (DOI): 10.1021/acsearthspacechem.8b00037 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85050597580 (DOI: 10.1021/acsearthspacechem.8b00037, Elsevier: Scopus)
36.	Sumitomo Takuya, Osaki Mari, Takeshi Ogusu, Masaki Takeuchi and Hideji TANAKA : Internal Standard-Amplitude Modulated Multiplexed Flow Analysis, Analytical Sciences, Vol.33, No.12, 1363-1368, 2017. (Summary) A new concept of flow analysis, internal standard-amplitude modulated multiplexed flow analysis, is proposed. A proof of concept was verified by applying it to the determination of ferrous ion (Fe) by 1,10-phenanthroline (o-Phen) spectrophotometry. The flow rates of sample solutions containing Methylene Blue (MB) as an internal standard substance were sinusoidally varied at different frequencies. The solutions were merged with a color reagent (o-Phen) solution, while the total flow rate was held constant. Downstream, analytical signals were monitored at the maximum absorption wavelengths of Fe-o-Phen complex and of MB (510 and 644 nm, respectively). The signals were respectively analyzed by fast Fourier transform. The concentrations of the analytes in respective samples were simultaneously determined from the amplitudes of the corresponding wave components. The precision, linearity of the calibration curve, limit of detection and robustness against deliberate fluctuation in flow rate were greatly improved by introducing the internal standard method. Good recoveries of around 100% were obtained for Fe spiked into real water samples. (Tokushima University Institutional Repository) ● Metadata: 116830 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.33.1363 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29225225 ● Summary page in Scopus @ Elsevier: 2-s2.0-85037551193 (Tokushima University Institutional Repository: 116830, DOI: 10.2116/analsci.33.1363, PubMed: 29225225, Elsevier: Scopus)
37.	Otsuka Yuta, Ito Akira, Masaki Takeuchi and Hideji TANAKA : Dry Mechanochemical Synthesis of Caffeine/Oxalic Acid Cocrystals and Their Evaluation by Powder X-Ray Diffraction and Chemometrics, Journal of Pharmaceutical Sciences, Vol.106, No.12, 3458-3464, 2017. (Summary) We report the effects of dry mechanochemical synthesis conditions on the crystallization of caffeine (CA) and oxalic acid (OX) 2:1 cocrystal. CA anhydrate and OX dihydrate were grinded at various temperatures, rotation speeds, and grinding time. The cocrystal was also synthesized by an organic solvent evaporation method, as a reference. The produced samples were measured by a powder X-ray diffraction (PXRD) analysis. The PXRD spectra suggest that the grinded cocrystal has a lower crystallinity than the evaporated one. The diffractograms for the cocrystals synthesized by 2 kinds of methods were further evaluated by multivariate curve resolution-alternating least squares method. Sources of the mathematical models constructed were assigned to the cocrystal and unreacted mixture of CA and OX dihydrate. The present approach is concluded to be useful for the improvement of pharmaceutical property because cocrystallization is closely relating to the solubility characteristics, bioavailability, stability, and so on of drugs. (Keyword) Caffeine / Crystallization / Oxalic Acid / Powder Diffraction / Powders / Solubility / Solvents / Spectroscopy, Fourier Transform Infrared / Temperature / X-Ray Diffraction (Link to Publication Site) ● Publication site (DOI): 10.1016/j.xphs.2017.07.025 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 28797789 ● Summary page in Scopus @ Elsevier: 2-s2.0-85028578193 (DOI: 10.1016/j.xphs.2017.07.025, PubMed: 28797789, Elsevier: Scopus)
38.	Akira Ito, Yuta Otsuka, Masaki Takeuchi and Hideji TANAKA : Mechanochemical synthesis of chloroapatite and its characterization by powder X-ray diffractometory and attenuated total reflection - infrared spectroscopy, Colloid and Polymer Science, Vol.295, No.10, 2011-2018, 2017. (Link to Publication Site) ● Publication site (DOI): 10.1007/s00396-017-4177-7 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85028296087 (DOI: 10.1007/s00396-017-4177-7, Elsevier: Scopus)
39.	Naoya Kakiuchi, Aiko Miyazaki, Akihiro Fujikawa, Masaki Takeuchi and Hideji TANAKA : High Throughput Titration Based on Variable and Fixed Triangular Wave Controlled Flow Radiometry with LED-Photodiode Detector, Journal of Flow Injection Analysis, Vol.34, No.1, 11-14, 2017. (Tokushima University Institutional Repository) ● Metadata: 118038 (Tokushima University Institutional Repository: 118038)
40.	Masaki Takeuchi, Yuki Miyazaki, Hideji TANAKA, Takaharu Isobe, Hiroshi Okochi and Hiroko Ogata : High Time-Resolution Monitoring of Free-Tropospheric Sulfur Dioxide and Nitric Acid at the Summit of Mt. Fuji, Japan, Water, Air, and Soil Pollution, Vol.228, No.9, Article:325, 2017. (Tokushima University Institutional Repository) ● Metadata: 114025 (Link to Publication Site) ● Publication site (DOI): 10.1007/s11270-017-3514-2 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85027489437 (Tokushima University Institutional Repository: 114025, DOI: 10.1007/s11270-017-3514-2, Elsevier: Scopus)
41.	白水好美, 田中勝, Hideji TANAKA and Masaki Takeuchi : クリーンルーム雰囲気中のアンモニア及びアミンガスを監視するウエットデニューダ方式の自動モニタ, Bunseki Kagaku, Vol.66, No.7, 503-508, 2017. (Tokushima University Institutional Repository) ● Metadata: 114295 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.66.503 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2116/bunsekikagaku.66.503 (Tokushima University Institutional Repository: 114295, DOI: 10.2116/bunsekikagaku.66.503)
42.	Otsuka Yuta, Akira Ito, Matsumura Saki, Masaki Takeuchi, Pal Suvra and Hideji TANAKA : Quantification of pharmaceutical compounds based on powder X-ray diffraction with chemometrics, Chemical & Pharmaceutical Bulletin, Vol.64, No.8, 1129-1135, 2016. (Summary) We propose an approach for the simultaneous determination of multiple components in pharmaceutical mixed powder based on powder X-ray diffraction (PXRD) method coupled with chemometrics. Caffeine anhydrate, acetaminophen and lactose monohydrate were mixed at various ratios. The samples were analyzed by PXRD method in the ranges of 2=5.00-30.0 and 35.0-45.0 degrees. Obtained diffractograms were analyzed by conventional peak intensity method, multi curve resolution (MCR)-alternating least squares (ALS) method and partial least squares (PLS) method. Constructed PLS models can most accurately predict the concentrations among different methods used. Each regression vector of PLS correlates not only to the compound of interest but also to the coexisting compounds. The combination of PXRD and PLS methods is concluded to be powerful approach for analyzing multi components in pharmaceutical formulations. (Keyword) Acetaminophen / Caffeine / Lactose / Powder Diffraction / Powders (Link to Publication Site) ● Publication site (DOI): 10.1248/cpb.c16-00151 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27477651 ● Summary page in Scopus @ Elsevier: 2-s2.0-84982690210 (DOI: 10.1248/cpb.c16-00151, PubMed: 27477651, Elsevier: Scopus)
43.	Naoya Tomiyasu, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : Online Analysis of Water-soluble Acidic Gases and Anions in PM2.5 at Tokushima City in Winter of 2015, Bunseki Kagaku, Vol.65, No.8, 425-432, 2016. (Summary) This paper describes a simultaneous analytical system used for atmospheric water-soluble acidic gases and anions in PM<sub>2.5</sub>. The analytical system, consisting mainly of a parallel-plate wet denuder, mist chamber-hydrophobic filter based particle collector, and ion chromatograph provides automatically two acidic gas and two PM<sub>2.5</sub> data with in one hour. We applied the system to the continuous measurement of air pollutants at Tokushima, Japan in the winter of 2015, and obtained meaningful data in 97.9 % of the sampling period. The average acidic gas concentration and anion concentration in the PM<sub>2.5</sub> were, respectively, 4.85±3.08 nmol m<sup>-3</sup> for HCl, 22.19±18.47 nmol m<sup>-3</sup> for HONO, 9.54±2.52 nmol m<sup>-3</sup> for HNO<sub>3</sub>, 101.57±71.99 nmol m<sup>-3</sup> for SO<sub>2</sub>, 3.78±6.48 nmol m<sup>-3</sup> for Cl<sup>-</sup>, 3.37±1.99 nmol m<sup>-3</sup> for NO<sub>2</sub><sup>-</sup>, 25.16±31.49 nmol m<sup>-3</sup> for NO<sub>3</sub><sup>-</sup>, and 92.61±55.33 nmol m<sup>-3</sup> for SO<sub>4</sub><sup>2-</sup>. Characteristic diurnal patterns were observed in several gases. The concentration of HCl fluctuated with changes in the temperature with a 2-hour time-lag. The concentration of HONO peaked in the morning and middle of the night, and its behavior showed a similar pattern of NO<sub>2</sub> concentration. Backward trajectory analysis suggested that a high concentration of SO<sub>2</sub> that was emitted from China was transported to the sampling site, Tokushima, Japan. (Keyword) online analysis / acidic gas / PM2.5 / anion / Tokushima (Tokushima University Institutional Repository) ● Metadata: 114294 (Link to Publication Site) ● Publication site (DOI): 10.2116/bunsekikagaku.65.425 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679638240128 ● Summary page in Scopus @ Elsevier: 2-s2.0-84988431133 (Tokushima University Institutional Repository: 114294, DOI: 10.2116/bunsekikagaku.65.425, CiNii: 1390282679638240128, Elsevier: Scopus)
44.	Hiroya Kubo, Azumi Miyazaki, Kazunori Kuritani, Masaki Takeuchi and Hideji TANAKA : Cobalt(III) Pretreatment for Total Phosphorus Determination, Phosphorus Research Bulletin, Vol.30, No.1, 26-29, 2015. (Summary) Abstract: A fast and simple pretreatment method of phosphorus compounds using Co<SUP>3+</SUP> has been studied for the spectrophotometric determination of total phosphorus in water samples. Sample was mixed with a pretreatment solution (0.05 mol dm<SUP>-3</SUP> CoSO<SUB>4</SUB> in 1 mol dm<SUP>-3</SUP> H<SUB>2</SUB>SO<SUB>4</SUB>) in an electrolytic cell at the volume ratio of 4:1. Highly reactive Co<SUP>3+</SUP> was continuously generated through the electrolysis of Co<SUP>2+</SUP> during the pretreatment. Aliquot of the solution was injected to the system of flow injection - Molybdenum Blue spectrophotometry in order to evaluate phosphate ion (PO<SUB>4</SUB><SUP>3-</SUP>) produced. Organic phosphorus compounds are completely decomposed to PO<SUB>4</SUB><SUP>3-</SUP> within 2 min by Co<SUP>3+</SUP> under moderate condition (70°C). The Co<SUP>3+</SUP> is also effective for the acid hydrolysis of polyphosphates; diphosphate and tripolyphosphate are converted to PO<SUB>4</SUB><SUP>3-</SUP> within 8 min through the pretreatment. Possible mechanisms of the pretreatment are discussed based on the strong oxidizing activity and the Lewis acid nature of Co<SUP>3+</SUP>. (Keyword) Determination of total phosphorus / polyphosphate / organic phosphorus / Co<SUP>3+</SUP> pretreatment / flow injection analysis (Link to Publication Site) ● Publication site (DOI): 10.3363/prb.30.26 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205286918272 ● Search Scopus @ Elsevier (DOI): 10.3363/prb.30.26 (DOI: 10.3363/prb.30.26, CiNii: 1390001205286918272)
45.	Yuta Otsuka, Akira Ito, Saki Matsumura, Masaki Takeuchi and Hideji TANAKA : Effect of hydroxypropyl cellulosse and hydroxypropyl methylcellulose on carbamazepine polymorphic transformation; attenuated total reflectance-infrared spectroscopy and chemiinformatics analysis, Colloid and Polymer Science, Vol.293, No.12, 3471-3478, 2015. (Link to Publication Site) ● Publication site (DOI): 10.1007/s00396-015-3698-1 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/s00396-015-3698-1 (DOI: 10.1007/s00396-015-3698-1)
46.	Koji Inui, Haruka Yoshida, Masaki Takeuchi and Hideji TANAKA : Application of Air Segmented Amplitude Modulated Multiplexed Flow Analysis with Software-Based Phase Recognition to the Determination of Ammonium Ion in Water Samples, Journal of Flow Injection Analysis, Vol.32, No.1, 5-8, 2015. (Keyword) Amplitude modulated multiplexed flow analysis / ammonium ion / Indophenol Blue / air segmentation / software-based phase recognition / fast Fourier transform (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679631543424 (CiNii: 1390282679631543424)
47.	Yuta Otsuka, Masaki Takeuchi, Makoto Otsuka, Besim Ben-Nissan, David Grossin and Hideji TANAKA : Effect of carbon dioxide on self-setting apatite cement formation from tetracalcium phosphate and dicalcium phosphate dihydrate; ATR-IR and chemoinformatics analysis, Colloid and Polymer Science, Vol.293, No.10, 2781-2788, 2015. (Link to Publication Site) ● Publication site (DOI): 10.1007/s00396-015-3616-6 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84942295907 (DOI: 10.1007/s00396-015-3616-6, Elsevier: Scopus)
48.	Masaki Takeuchi, Naoyuki Miki, Kiichi Ishimine and Hideji TANAKA : Nafion Membrane Tube-Based On-Line Concentrator. Application to Urinary Orotic Acid Determined by Suppressed Ion Chromatography, Journal of Flow Injection Analysis, Vol.32, No.2, 97-100, 2015. (Summary) This paper describes the performance of suppressed ion chromatography coupled with a Nafion membrane tube-based on-line concentration technique for the determination of urinary orotic acid, which serves as a biochemical indicator for ornithine transcarbamylase deficiency. After the separation of the analyte by the chromatography, it is concentrated while the eluent flows through the Nafion membrane tube, meanwhile, a nitrogen gas flows outside the tube to remove the solvent. The peak of orotic acid was increased with increasing sample residence time, nitrogen gas flow rate, and concentration temperature. With the concentrator, the detection sensibility was improved, and the lower detection limit was obtained compared to that without the concentrator. The optimized system has successfully been applied to the determination of orotic acid in real urinary samples. (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.32.2_97 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679632311552 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.32.2_97 (DOI: 10.24688/jfia.32.2_97, CiNii: 1390282679632311552)
49.	Kei Toda, Satoru Yunoki, Akira Yanaga, Masaki Takeuchi, Shin-Ichi Ohira and Purnendu K. Dasgupta : Formaldehyde Content of Atmospheric Aerosol, Environmental Science and Technology, Vol.48, No.12, 6636-6643, 2014. (Summary) Formaldehyde (HCHO) is a highly soluble polar molecule with a large sticking coefficient and thus likely exists in both gaseous and particulate forms. Few studies, however, address particulate HCHO (HCHO(p)). Some report that HCHO(p) concentrations (obtained only with long duration sampling) are very low. The lack of data partly reflects the difficulty of specifically measuring HCHO(p). Long duration filter sampling may not produce meaningful results for a variety of reasons. In this work, gaseous HCHO (HCHO(g)) and (HCHO(p)) were, respectively, collected with a parallel plate wet denuder (PPWD) followed by a mist chamber/hydrophilic filter particle collector (PC). The PPWD quantitatively removed HCHO(g) and the PC then collected the transmitted aerosol. The collected HCHO from either device was alternately analyzed by Hantzsch reaction-based continuous flow fluorometry. Each gas and particle phase measurement took 5 min each, with a 10 min cycle. The limits of detection were 0.048 and 0.0033 μg m(-3), respectively, for HCHO(g) and HCHO(p). The instrument was deployed in three separate campaigns in a forest station in western Japan in March, May, and July of 2013. Based on 1296 data pairs, HCHO(p), was on the average, 5% of the total HCHO. Strong diurnal patterns were observed, with the HCHO(p) fraction peaking in the morning. The relative humidity dependence of the partition strongly suggests that it is driven by the liquid water content of the aerosol phase. However, HCHO(p) was 100× greater than that expected from Henry's law. We propose that the low water activity in the highly saline droplets lead to HCHO oligomerization. (Keyword) Aerosols / Air / Atmosphere / Formaldehyde / Gases / Humidity / Japan / Particulate Matter / Pentanones / Seasons / Solutions / Time Factors / Trees / Water (Link to Publication Site) ● Publication site (DOI): 10.1021/es500590e (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 24857706 ● Summary page in Scopus @ Elsevier: 2-s2.0-84902596918 (DOI: 10.1021/es500590e, PubMed: 24857706, Elsevier: Scopus)
50.	Takeshi Ogusu, Katsuya Uchimoto, Masaki Takeuchi and Hideji TANAKA : Air Segmented-Amplitude Modulated Multiplexed Flow Analysis with Software-Based Phase Recognition. Determination of Phosphate Ion, Talanta, Vol.118, 123-128, 2014. (Summary) Amplitude modulated multiplexed flow analysis (AMMFA) has been improved by introducing air segmentation and software-based phase recognition. Sample solutions, the flow rates of which are respectively varied at different frequencies, are merged. Air is introduced to the merged liquid stream in order to limit the dispersion of analytes within each liquid segment separated by air bubbles. The stream is led to a detector with no physical deaeration. Air signals are distinguished from liquid signals through the analysis of detector output signals, and are suppressed down to the level of liquid signals. Resulting signals are smoothed based on moving average computation. Thus processed signals are analyzed by fast Fourier transform. The analytes in the samples are respectively determined from the amplitudes of the corresponding wave components obtained. The developed system has been applied to the simultaneous determinations of phosphate ions in water samples by a Malachite Green method. The linearity of the analytical curve (0.0-31.0 mol dm(-3)) is good (r(2)>0.999) and the detection limit (3.3 ) at the modulation period of 30s is 0.52 mol dm(-3). Good recoveries around 100% have been obtained for phosphate ions spiked into real water samples. (Keyword) Air / Electrons / Flow Injection Analysis / Phase Transition / Phosphates / Software / Solutions / Spectroscopy, Fourier Transform Infrared (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talanta.2013.10.001 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 24274279 ● Summary page in Scopus @ Elsevier: 2-s2.0-84887002712 (DOI: 10.1016/j.talanta.2013.10.001, PubMed: 24274279, Elsevier: Scopus)
51.	Masaki Takeuchi, Yuki Miyazaki, Hiromichi Tsunoda and Hideji TANAKA : Atmospheric Acid Gases in Tokushima, Japan, Monitored with Parallel Plate Wet Denuder Coupled Ion Chromatograph, Analytical Sciences, Vol.29, No.1, 165-168, 2013. (Summary) During the summer of 2011 and winter of 2012, we continuously measured trace acid gas concentrations in Tokushima, Japan, using a parallel plate wet denuder coupled ion chromatograph. The average concentrations of hydrochloric acid (HCl), nitrous acid (HONO), nitric acid (HNO(3)), and sulfur dioxide (SO(2)) were, respectively, 0.54, 1.20, 1.17, and 3.22 g m(-3) in the summer, and 0.09, 1.06, 0.46, and 5.11 g m(-3) in the winter. In the summer, concentrations of all the acid gases increased after sunrise and showed a strong diurnal pattern with daytime maxima and nighttime minima, but the time at which concentration levels began to increase and the pace of increase differed among the acid gases. The concentration of HONO increased sharply immediately after sunrise, while concentrations of the other three gases began increasing about one and half hours later. SO(2) showed the fastest rate of increase, followed by HNO(3) and HCl. These differences were likely attributable to the formation processes of gaseous substances. (Keyword) Acids, Noncarboxylic / Air / Air Pollutants / Chromatography / Environmental Monitoring / Gases / Hydrochloric Acid / Japan / Nitric Acid / Nitrous Acid / Seasons / Sulfur Dioxide (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.29.165 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 23303105 ● Search Scopus @ Elsevier (PMID): 23303105 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.29.165 (DOI: 10.2116/analsci.29.165, PubMed: 23303105)
52.	Masaki Takeuchi, Masato Izumi, Mizuki Watanabe, Hideji TANAKA, Tomoaki Obata and Kei Toda : Surface Modified Annular Wet Denuder for the Collection of Water-Soluble Trace Gases, Analytical Methods, Vol.5, No.21, 6071-6075, 2013. (Link to Publication Site) ● Publication site (DOI): 10.1039/c3ay40680f (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84885621334 (DOI: 10.1039/c3ay40680f, Elsevier: Scopus)
53.	Masaki Takeuchi, Kaoru Yoshioka, Yusuke Toyama, Ai Kagami and Hideji TANAKA : On-Line Measurement of Perchlorate in Atmospheric Aerosol Based on Ion Chromatograph Coupled with Particle Collector and Post-Column Concentrator, Talanta, Vol.97, 527-532, 2012. (Summary) An automated analysis system has been developed for measuring perchlorate concentration in atmospheric aerosol. The perchlorate in aerosol sample, which has been collected with water mist in a hydrophobic filter/mist chamber based particle collector, is continuously preconcentrated. The matrix ions such as sulfate are subsequently removed from the preconcentrator. The remaining perchlorate is then analyzed on-line with an ion chromatograph in conjunction with a Nafion membrane tube based post-column concentrator. The sensitivity is increased by a factor of 7.7 with the post-column concentration technique. The proposed system has been successfully operated at Tokushima, Japan. The limit of detection is 0.35 ng/m(3) for 3 h sampling cycle. The perchlorate concentration in the atmospheric aerosol averaged 1.01±1.75 ng/m(3) (n=12). (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talanta.2012.05.009 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 22841118 ● Search Scopus @ Elsevier (PMID): 22841118 ● Search Scopus @ Elsevier (DOI): 10.1016/j.talanta.2012.05.009 (DOI: 10.1016/j.talanta.2012.05.009, PubMed: 22841118)
54.	Haruka Yoshida, Koji Inui, Masaki Takeuchi and Hideji TANAKA : Simultaneous Determination of Nitrite and Nitrate Ions by Air-Segmented Amplitude-Modulated Multiplexed Flow Analysis, Analytical Sciences, Vol.28, No.5, 523-525, 2012. (Summary) The concept of amplitude-modulated multiplexed flow analysis has been extended to the simultaneous determination of multiple analytes in a sample. A sample solution containing nitrite and nitrate ions is delivered from two channels, but the flow rates are varied at different frequencies. One of the channels has a reduction column for converting nitrate ions to nitrite ions. Downstream, the absorbance of the diazo-coupling product is monitored after the merging of both solutions with a Griess reagent. The signal is analyzed by a fast Fourier transform (FFT) in real time. From the thus-obtained amplitude, a µmol dm(-3) level of the ions can be determined. The introduction of air bubbles is effective to reduce any axial dispersion, and hence to improve the sensitivity. (Keyword) Air / Flow Injection Analysis / Ions / Nitrates / Nitrites (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.28.523 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 22687934 ● CiNii @ National Institute of Informatics (CRID): 1390282679238745472 ● Search Scopus @ Elsevier (PMID): 22687934 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.28.523 (DOI: 10.2116/analsci.28.523, PubMed: 22687934, CiNii: 1390282679238745472)
55.	Masaki Takeuchi, Hiromichi Tsunoda, Hideji TANAKA and Yoshimi Shiramizu : Parallel-Plate Wet Denuder Coupled Ion Chromatograph for Near-Real-Time Detection of Trace Acidic Gases in Clean Room Air, Analytical Sciences, Vol.27, No.8, 805-810, 2011. (Summary) This paper describes the performance of our automated acidic (CH(3)COOH, HCOOH, HCl, HNO(2), SO(2), and HNO(3)) gases monitor utilizing a parallel-plate wet denuder (PPWD). The PPWD quantitatively collects gaseous contaminants at a high sample flow rate (8 dm(3) min(-1)) compared to the conventional methods used in a clean room. Rapid response to any variability in the sample concentration enables near-real-time monitoring. In the developed monitor, the analyte collected with the PPWD is pumped into one of two preconcentration columns for 15 min, and determined by means of ion chromatography. While one preconcentration column is used for chromatographic separation, the other is used for loading the sample solution. The system allows continuous monitoring of the common acidic gases in an advanced semiconductor manufacturing clean room. (Keyword) Acetic Acid / Air / Chromatography, Gas / Formic Acids / Gases / Hydrochloric Acid / Nitric Acid / Nitrous Acid / Sulfur Dioxide / Wettability (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.27.805 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 21828917 ● Search Scopus @ Elsevier (PMID): 21828917 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.27.805 (DOI: 10.2116/analsci.27.805, PubMed: 21828917)
56.	Inui Koji, Uemura Takechi, Ogusu Takechi, Masaki Takeuchi and Hideji TANAKA : Air-Segmented Amplitude-Modulated multiplexed Flow Analysis, Analytical Sciences, Vol.27, No.3, 305-308, 2011. (Summary) Air-segmentation is applied to amplitude-modulated multiplexed flow analysis, which we proposed recently. Sample solutions, the flow rates of which are varied periodically, are merged with reagent and/or diluent solution. The merged stream is segmented by air-bubbles and, downstream, its absorbance is measured after deaeration. The analytes in the samples are quantified from the amplitudes of the respective wave components in the absorbance. The proposed method is applied to the determinations of a food dye, phosphate ions and nitrite ions. The air-segmentation is effective for limiting amplitude damping through the axial dispersion, resulting in an improvement in sensitivity. This effect is more pronounced at shorter control periods and longer flow path lengths. (Keyword) Air / Flow Injection Analysis / Indicators and Reagents / Nitrites / Phosphates / Rhodamines / Solutions / Spectrophotometry / Water (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.27.305 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 21415514 ● Search Scopus @ Elsevier (PMID): 21415514 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.27.305 (DOI: 10.2116/analsci.27.305, PubMed: 21415514)
57.	Takeshi Uemura, Takeshi Ogusu, Masaki Takeuchi and Hideji TANAKA : Spectrophotometric Determination of Trace Phosphate Ion by Amplitude Modulated Flow Analysis Coupled with Malachite Green Method, Analytical Sciences, Vol.26, No.7, 797-801, 2010. (Summary) An amplitude-modulated flow analysis coupled with lock-in detection is proposed for the determination of trace phosphate. The flow rate F(S) of sample solution is varied in response to a periodic signal V(c) of alternating waveform. A coloring reagent solution (ammonium molybdate + Malachite Green) is delivered at a constant flow rate F(R). Under the constant total flow rate F(T), both solutions are merged with a diluent (water). Phosphate ion in the sample reacts with molybdate and then with Malachite Green to form green ion pairs in acidic media. Downstream, the absorbance of the mixed solution is measured at 625 nm. The output voltage V(d) from the detector is sent to a lock-in amplifier, where the wave component of V(d) that has the same frequency as that of V(c) is distinguished from background signals. Phosphate ion can be determined from the amplitude of the component thus extracted. The calibration curve is linear (r(2) > 0.998) and the limit of detection (3.3sigma) is 0.17 micromol dm(-3). Compared with a conventional flow-based method with no modulation, the present method is less susceptible to the baseline drift due mainly to the adsorption of the ion-pair on the optical window, because the quantification is based not on the absorbance itself but on the amplitude of the absorbance. Good recoveries around 100% are obtained for the phosphate ions spiked into real water samples. (Keyword) Flow Injection Analysis / Phosphates / Rosaniline Dyes / Spectrophotometry / Water (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.26.797 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 20631442 ● Search Scopus @ Elsevier (PMID): 20631442 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.26.797 (DOI: 10.2116/analsci.26.797, PubMed: 20631442)
58.	Yohei Kurokawa, Masaki Takeuchi and Hideji TANAKA : Analytical Parameters for Amplitude Modulated Multiplexed Flow Analysis, Analytical Sciences, Vol.26, No.7, 791-796, 2010. (Summary) Analytical conditions of amplitude-modulated multiplexed flow analysis, the basic concept of which was recently proposed by our group, are investigated for higher sample throughput rate. The performance of the improved system is evaluated by applying it to the determination of chloride ions. The flow rates of two sample solutions are independently varied in accordance with sinusoidal voltage signals, each having different frequency. The solutions are merged with a reagent solution and/or a diluent, while the total flow rate is held constant. Downstream, the analytical signal V(d) is monitored with a spectrophotometer. The V(d) shows a complicated profile resulting from amplitude modulated and multiplexed information on the two samples. The V(d) can, however, be deconvoluted to the contribution of each sample through fast Fourier transform (FFT). The amplitudes of the separated wave components are closely related to the concentrations of the analytes in the samples. By moving the window for FFT analysis with time, a temporal profile of the amplitudes can be obtained in real-time. Analytical conditions such as modulation period and system configuration have been optimized using aqueous solutions of Malachite Green (MG). Adequate amplitudes are obtained at the period of as low as 5 s. At this period, the calibration curve for the MG concentration of 0-30 micromol dm(-3) has enough linearity (r(2) = 0.999) and the limit of detection (3.3sigma) is 1.3 micromol dm(-3); the relative standard deviation of repeated measurements (C(MG) = 15 micromol dm(-3), n = 10) is 2.4%. The developed system has been applied to the determination of chloride ions by a mercury(II) thiocyanate method. The system can adequately follow the changes in analyte concentration. The recoveries of chloride ion spiked in real water samples (river and tap water) are satisfactory, around 100%. (Keyword) Chlorides / Flow Injection Analysis / Fourier Analysis / Spectrophotometry / Water (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.26.791 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 20631441 ● Search Scopus @ Elsevier (PMID): 20631441 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.26.791 (DOI: 10.2116/analsci.26.791, PubMed: 20631441)
59.	Kei Toda, Tomoaki Obata, Vladimir A. Obolkin, Vladimir L. Potemkin, Kazutoshi Hirota, Masaki Takeuchi, Shou Arita, Tamara V. Khodzher and Michael A. Grachev : Atmospheric Methanethiol Emitted from a Pulp and Paper Plant on the Shore of Lake Baikal., Atmospheric Environment, Vol.44, No.20, 2427-2433, 2010. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.atmosenv.2010.03.037 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.atmosenv.2010.03.037 (DOI: 10.1016/j.atmosenv.2010.03.037)
60.	Vladimir A. Obolkin, Vladimir L. Potemkin, Tamara V. Khodzher, Ludmila P. Golobokova, Ulyana G. Filippova, Vladimir L. Makukhin, Kei Toda, Masaki Takeuchi, Tomoaki Obata and Kazutoshi Hirota : Dynamics of Sulfur-Containing Admixtures in the Atmosphere around the Point Source the Baikal Pulp and Paper Plant (South-East of Baikal Lake)., Atmospheric and Oceanic Optics, Vol.23, No.1, 32-38, 2010. (Link to Publication Site) ● Publication site (DOI): 10.1134/S1024856010010070 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1134/S1024856010010070 (DOI: 10.1134/S1024856010010070)
61.	Tursunjan Aydan, Masaki Takeuchi and Hideji TANAKA : Spectrophotometric Determination of Anionic Sufactant Based on Ion-pair Formation with Methylene Blue in Riversed Flow Injection Mode, Journal of Flow Injection Analysis, Vol.26, No.2, 133-137, 2009. (Keyword) Reversed flow injection analysis / online extraction / anionic surfactant / Methylene Blue / ion-pair (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282763046403968 (CiNii: 1390282763046403968)
62.	Tursunjan Aydan, Ayumi Kitagawa, Masaki Takeuchi and Hideji TANAKA : Application of Feedback-Based Flow Ratiometry to Simultaneous Determination of Calcium and Magnesium Ions by Chelatometry Using Photometric and Potentiometric Detectors, Journal of Flow Injection Analysis, Vol.25, No.1, 65-68, 2008. (Keyword) Flow Analysis (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390564238029845760 (CiNii: 1390564238029845760)
63.	Masaki Takeuchi, Qingyang Li, Bingcheng Yang, Purnendu K Dasgupta and Vincent E Wilde : Use of a Capacitance Measurement Device for Surrogate Noncontact Conductance Measurement, Talanta, Vol.76, No.3, 617-620, 2008. (Summary) A capacitance to digital converter (AD7746) is used in the same mode as noncontact conductance detectors. The detector output is linearly proportional to specific conductance (sigma) at low sigma values but becomes nonlinear and reaches a plateau value at sigma approximately >0.75 mS/cm, regardless of the nature of the electrolyte. For all applications at sub- to low-mM concentrations, the device, available as an evaluation board, provides a very affordable nothing-else-required means of contactless surrogate conductivity detection from capillary scale to larger bore conduits. For the same measurement cell volume, the detector provides virtually the same limits of detection (LODs) as a standard galvanic contact conductivity detector in conventional scale suppressed conductometric ion chromatography. The detection limits deteriorate as the conduit inner diameter decreases. (Keyword) Capacitance / Noncontact / Conductance (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talanta.2008.04.001 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 18585329 ● Search Scopus @ Elsevier (PMID): 18585329 ● Search Scopus @ Elsevier (DOI): 10.1016/j.talanta.2008.04.001 (DOI: 10.1016/j.talanta.2008.04.001, PubMed: 18585329)
64.	Bingcheng Yang, Masaki Takeuchi and Purnendu K Dasgupta : On-Line Gas-Free Electrodialytic Eluent Generator for Capillary Ion Chromatography., Analytical Chemistry, Vol.80, No.1, 40-47, 2008. (Summary) Both low- and high-pressure, gas-free, capillary-scale electrodialytic generators for eluents in ion chromatography are described. While the low-pressure devices rely on planar or tubular membranes, the high-pressure devices rely on ion-exchange beads used both as one-way ionic gates and as ball-on-seat valves to provide sealing. The high-pressure device is easily implemented in the form of a commercial cross fitting and can withstand at least 1400 psi. By design these devices do not produce gas in the eluent channel; hence, it is not necessary to remove gas afterward. With appropriate electrolytes and electrode polarities, such devices can produce either acid or base or salt. In regard to ionic transport, the behavior of these devices fully corresponds to that of a semiconductor diode. To our knowledge, this is the first time such complete equivalence of ion transport through ion-exchange media and with the more familiar example of electron transport through a semiconductor diode under both forward- and reverse-biased conditions have been demonstrated. Reverse bias can be applied to minimize/prevent Donnan-forbidden leakage or ion exchange. Even with 4 M KOH in the electrode compartments and 4 microL/min water flowing through the eluent channel, with a reverse bias of -12 V, the leakage KOH concentration is <30 microM, whereas the KOH concentration with zero voltage applied, herein after termed open circuit penetration (OCP), is 1600 microM. It is suggested that this OCP occurs not as much through Donnan-forbidden leakage but via ion exchange. Chromatograms and reproducibility data are presented for both isocratic and gradient chromatography, using ion-exchange, latex-modified, open tubular and packed monolithic columns. (Keyword) eluent generator / capillary ion chromatography (Link to Publication Site) ● Publication site (DOI): 10.1021/ac701889x (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 18062705 ● Summary page in Scopus @ Elsevier: 2-s2.0-41349123490 (DOI: 10.1021/ac701889x, PubMed: 18062705, Elsevier: Scopus)
65.	Hideji TANAKA, Mima Takuto, Masaki Takeuchi and Hitoshi Iida : Amplitude Modulated multiplexed flow analysis, Talanta, Vol.77, No.2, 576-580, 2008. (Keyword) Flow Analysis (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talanta.2008.03.016 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.talanta.2008.03.016 (DOI: 10.1016/j.talanta.2008.03.016)
66.	Masaki Takeuchi, Purnendu K Dasgupta, Jason V Dyke and Kannan Srinivasan : Postcolumn Concentration in Liquid Chromatography. On-Line Eluent Evaporation and Analyte Postconcentration in Ion Chromatography, Analytical Chemistry, Vol.79, No.15, 5690-5697, 2007. (Summary) On-line sample concentration by evaporation through a narrow-bore membrane tube is described. The device can be deployed just prior to the detector or the sample may be concentrated prior to injection. As solution flows through a solvent-permeable membrane tube, (heated) drying gas (nitrogen/air) flows outside it to remove the solvent. The removal rate increases with increasing sample residence time, drying gas flow rate, and temperature. Various membranes and three concentrator designs (a rectangular maze, a serpentine and a filament-filled helix, the last performing the best) were fabricated and tested for post- and preseparation applications in suppressed anion chromatography. An order of magnitude concentration factors are readily obtained. The present system involves active mass transport radially outward through the walls of a tube. This is a system in which many of the traditional paradigms of flow through a tubular conduit no longer hold true. Because the flow rate continuously varies along the tube, residence time does not scale linearly with residence volume or conduit length. The effects of such mass transport on the parabolic velocity profile of laminar flow remain unknown. (Keyword) concentration / postculumn / on-line / ion chromatography (Link to Publication Site) ● Publication site (DOI): 10.1021/ac0703799 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 17608451 ● Search Scopus @ Elsevier (PMID): 17608451 ● Search Scopus @ Elsevier (DOI): 10.1021/ac0703799 (DOI: 10.1021/ac0703799, PubMed: 17608451)
67.	Bingcheng Yang, Masaki Takeuchi, Purnendu K Dasgupta, Tomonari Umemura, Yuji Ueki and Kin-Ichi Tsunoda : Tailoring elution of tetraalkylammonium ions. Ideal electrostatic selectivity elution order on a polymeric ion exchanger, Analytical Chemistry, Vol.79, No.2, 769-772, 2007. (Summary) Although ion exchange is often depicted as a process driven by electrostatic forces, ionic solvation or hydrophobic forces contribute greatly to ion exchange selectivity and is often the dominant factor. On a variety of commercial anion exchange columns, monovalent ClO4- elutes after doubly charged SO42- and even triply charged PO43-. For identically charged alkali metal ions, electrostatic charge densities based on crystal radii would suggest Li+ to be the most strongly retained on a cation exchanger. In practice, it is typically the least strongly held cation on most cation exchangers, because of its very high hydration energy and with most eluents its capacity factor approaches zero. Even when the ion is very poorly solvated, as with tetraalkylammonium (NR4+) cations, there has never been a report on a polymeric ion exchanger of an ideal electrostatic selectivity order where NR4+ cations elute in their increasing charge density order: R = n-butyl first, followed by n-propyl, ethyl, and last, methyl. We show that this selectivity order is easily achieved on recently described methracrylate-based monolithic capillary cation exchange columns (Ueki, Y.; Umemura, T.; Li, J. X.; Odake, T; Tsunoda, K. Anal. Chem. 2004, 76, 7007-7012) with minor amounts of hydroorganic modifiers. Indeed, under such conditions, Li+ (and other alkali cations) elutes after NMe4+. (Keyword) tetraalkylammonium ions / monolithic column / electrostatic selectivity / ion exchanger (Link to Publication Site) ● Publication site (DOI): 10.1021/ac061648i (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 17222049 ● Search Scopus @ Elsevier (PMID): 17222049 ● Search Scopus @ Elsevier (DOI): 10.1021/ac061648i (DOI: 10.1021/ac061648i, PubMed: 17222049)
68.	Rahmat SM Ullah, Masaki Takeuchi and Purnendu K Dasgupta : Versatile gas/particle ion chromatograph, Environmental Science and Technology, Vol.40, No.3, 962-968, 2006. (Summary) A new, compact gas/particle ion chromatograph has been developed for measuring ionic constituents in PM2.5 (particulate matter of aerodynamic diameter < or = 2.5 microm) and water-soluble ionogenic gases. The instrument has separate sampling channels for gases and particles. In one, a membrane denuder collects soluble gases for preconcentration and analysis. In the other, a cyclone removes larger particles, a membrane denuder removes soluble gases, and a continuously wetted hydrophilic filter collects particles. A single, multiport, syringe pump handles liquid transport, and one conductivity detector measures anions and ammonium for both channels. Electrodialytically generated gradient hydroxide eluent permits 20 min chromatographic runs. Gas/particle samples are each collected for 40 min, butthe sampling intervals are staggered by 20 min. Liquid samples from the gas denuder and particle collector are aspirated and preconcentrated on sequential cation and anion concentrators and transferred respectively to an ammonia transfer device and an anion separation column. The flow configuration results in an ammonium peak before anion peaks in the chromatogram. The system measures ammonia, organic acids (such as acetic, formic, and oxalic acids), HCl, HONO, SO2, HNO3, and the corresponding ions in the aerosol phase. Low ng/m3 to sub-ng/m3 limits of detection (LODs) are attained for most common gases and particulate constituents, the LODs for gaseous SO2 to NH3 range, for example, from sub parts per trillion by volume (sub-pptv) to approximately 5 pptv. (Keyword) gas / particle / ion chromatograph (Link to Publication Site) ● Publication site (DOI): 10.1021/es051722z (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 16509343 ● Search Scopus @ Elsevier (PMID): 16509343 ● Search Scopus @ Elsevier (DOI): 10.1021/es051722z (DOI: 10.1021/es051722z, PubMed: 16509343)
69.	Masaki Takeuchi, Rahmat SM Ullah, Purnendu K Dasgupta, Donald R Collins and Allen Williams : Continuous collection of soluble atmospheric particles with a wetted hydrophilic filter, Analytical Chemistry, Vol.77, No.24, 8031-8040, 2005. (Summary) Approximately one-third of the area (14-mm diameter of a 25-mm diameter) of a 5-microm uniform pore size polycarbonate filter is continuously wetted by a 0.25 mL/min water mist. The water forms a continuous thin film on the filter and percolates through it. The flowing water substantially reduces the effective pore size of the filter. At the operational air sampling flow rate of 1.5 standard liters per minute, such a particle collector (PC) efficiently captures particles down to very small size. As determined by fluorescein-tagged NaCl aerosol generated by a vibrating orifice aerosol generator, the capture efficiency was 97.7+% for particle aerodynamic diameters ranging from 0.28 to 3.88 microm. Further, 55.3 and 80.3% of 25- and 100-nm (NH4)2SO4 particles generated by size classification with a differential mobility analyzer were respectively collected by the device. The PC is integrally coupled with a liquid collection reservoir. The liquid effluent from the wetted filter collector, bearing the soluble components of the aerosol, can be continuously collected or periodically withdrawn. The latter strategy permits the use of a robust syringe pump for the purpose. Coupled with a PM2.5 cyclone inlet and a membrane-based parallel plate denuder at the front end and an ion chromatograph at the back end, the PC readily operated for at least 4-week periods without filter replacement or any other maintenance. (Keyword) aerosol (Link to Publication Site) ● Publication site (DOI): 10.1021/ac051539o (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 16351153 ● Search Scopus @ Elsevier (PMID): 16351153 ● Search Scopus @ Elsevier (DOI): 10.1021/ac051539o (DOI: 10.1021/ac051539o, PubMed: 16351153)
70.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Characteristics of water-soluble components of atmospheric aerosols in Yokohama and Mt. Oyama, Japan from 1990 to 2001, Atmospheric Environment, Vol.38, No.28, 4701-4708, 2004. (Keyword) aerosol / water-soluble components / Yokohama / Oyama (Link to Publication Site) ● Publication site (DOI): 10.1016/j.atmosenv.2004.05.027 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.atmosenv.2004.05.027 (DOI: 10.1016/j.atmosenv.2004.05.027)
71.	Masaki Takeuchi, Jianzhong Li, Kavin J Morris and Purnendu K Dasgupta : Membrane based parallel plate denuder for the collection and removal of soluble atmospheric gases, Analytical Chemistry, Vol.76, No.4, 1204-12010, 2004. (Summary) A continuously wetted cellulose acetate membrane-based parallel plate diffusion denuder is described. This is the first membrane-based denuder that has a small enough internal liquid holdup volume to permit reasonably rapid response time (10 --> 90% rise time of approximately 1.2 min for a transient event at a liquid flow rate of 500 microL/min) while permitting quantitative removal of common soluble atmospheric trace gases at flow rates up to 1.7 L/min. The latter attribute permits the use of the device as the first element in a particle sampling and analysis system for the quantitative removal of potentially interfering soluble trace gases. Particle losses in the denuder range from 0.9 to 2.9% over an aerodynamic diameter range of 0.38-3.48 microm, averaging 1.8%. However, only approximately 0.5% of the particles actually appears in the denuder effluent liquid. The relatively compact (300 mm H x 57 mm W x 26 mm D) wet denuder should be attractive in a number of applications. We show excellent agreement for HONO measurements with a conventional larger parallel plate wetted denuder in field measurements. (Keyword) gas / membrane denuder (Link to Publication Site) ● Publication site (DOI): 10.1021/ac0348423 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 14961756 ● Search Scopus @ Elsevier (PMID): 14961756 ● Search Scopus @ Elsevier (DOI): 10.1021/ac0348423 (DOI: 10.1021/ac0348423, PubMed: 14961756)
72.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Deposition of coarse soil particles and ambient gaseous components dominating dew water chemistry, Journal of Geophysical Research: Atmospheres, Vol.108, No.D10, 4319-4023, 2003. (Keyword) dew water / urban area / aerosol / week acid / carbon dioxide (Link to Publication Site) ● Publication site (DOI): 10.1029/2002JD003058 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-1642545127 (DOI: 10.1029/2002JD003058, Elsevier: Scopus)
73.	Masaki Takeuchi, Tetsuo Hasegawa, Hiroshi Okochi and Manabu Igawa : Size distribution of dew droplets and dew formation effect on deposition fluxes, Bulletin of the Chemical Society of Japan, Vol.75, No.6, 1299-1300, 2002. (Keyword) Dew water / size distribution / dry deposition / urban area (Link to Publication Site) ● Publication site (DOI): 10.1246/bcsj.75.1299 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1572543024686248064 ● Search Scopus @ Elsevier (DOI): 10.1246/bcsj.75.1299 (DOI: 10.1246/bcsj.75.1299, CiNii: 1572543024686248064)
74.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Controlling factors of weak acid and base concentrations in urban dewwater -comparison of dew chemistry with rain and fog chemistry-, Bulletin of the Chemical Society of Japan, Vol.4, No.75, 757-764, 2002. (Keyword) dry deposition / dew water / week acid / urban area / dry deposition
75.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Dominant factors of major and minor components and formation of hydroxyalkanesulfonate in urban dew-water, Water, Air, and Soil Pollution, Vol.130, No.1-4, 613-618, 2001. (Keyword) aerosol / dew-water / hydroxyalkanesulfonate / insoluble components / trace components (Link to Publication Site) ● Publication site (DOI): 10.1023/A:1013819704229 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-0034749912 (DOI: 10.1023/A:1013819704229, Elsevier: Scopus)
76.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : A study on chemical components and acidification mechanism of dew-water, Journal of Japan Society Atmospheric Environment, Vol.35, No.3, 158-169, 2000. (Keyword) dew-water / acidification / nitric acid / deposition flux (Link to Publication Site) ● Publication site (DOI): 10.11298/taiki1995.35.3_158 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.11298/taiki1995.35.3_158 (DOI: 10.11298/taiki1995.35.3_158)

Review, Commentary:

1.	大河内博, 谷悠人, 王一澤, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 宮崎あかね, 羽山伸一, 徳長ゆり香, 山口高志, 勝見尚也, 松木篤, 池盛文数, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : Current Status and Issues of Plastic Air Pollution, Earozoru Kenkyu, Vol.38, No.3, 145-159, Sep. 2023. (Keyword) AMΦ Project / Airborne Microplastics / Airborne Nanoplastics / µFTIR ATR Imaging / Py-GCMS / Aerodynamic Diameter / Concentration / Deposition (Link to Publication Site) ● Publication site (DOI): 10.11203/jar.38.145 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390578990185780992 ● Search Scopus @ Elsevier (DOI): 10.11203/jar.38.145 (DOI: 10.11203/jar.38.145, CiNii: 1390578990185780992)
2.	Masaki Takeuchi, Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Hideji TANAKA, 大河内博, 大谷肇, 寺前紀夫, William Pipkin, 松井和子 and 渡辺忠一 : 熱分解GC/MSの大気マイクロプラスチックへの適用, Journal of Japan Society for Atmospheric Environment, Vol.58, No.1, A41-A43, 2023. (Tokushima University Institutional Repository) ● Metadata: 117897 (Tokushima University Institutional Repository: 117897)
3.	大河内博, 谷悠人, 吉田昇永, 藤川真智子, 趙鶴立, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, 北野洸太郎, 宮崎あかね, 須永奈都, 羽山伸一, 徳長ゆり香, 山口高志, 勝見尚也, 松木篤, 池盛文数, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子, 新居田恭弘, 小林華栄 and 浦山憲雄 : 環境研究総合推進費:大気中マイクロプラスチックの実態解明と健康影響評価, Journal of Japan Society for Atmospheric Environment, Vol.58, No.1, A29-A34, 2023. (Tokushima University Institutional Repository) ● Metadata: 117898 (Tokushima University Institutional Repository: 117898)
4.	Masaki Takeuchi : Ion Chromatography : Fundamentals and Applications of Analytical Techniques, ぶんせき, Vol.555, No.3, 102-107, Mar. 2021. (Tokushima University Institutional Repository) ● Metadata: 116417 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050852945195363200 (Tokushima University Institutional Repository: 116417, CiNii: 1050852945195363200)
5.	Masaki Takeuchi : Titrimetry, Analytical Sciences, Vol.37, No.2, 227, 2021. (Tokushima University Institutional Repository) ● Metadata: 116418 (Link to Publication Site) ● Publication site (DOI): 10.2116/analsci.highlights2102 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 33563881 ● Search Scopus @ Elsevier (PMID): 33563881 ● Search Scopus @ Elsevier (DOI): 10.2116/analsci.highlights2102 (Tokushima University Institutional Repository: 116418, DOI: 10.2116/analsci.highlights2102, PubMed: 33563881)
6.	大塚裕太, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : バイオセラミックス合成における全反射減衰-赤外スペクトルと多変量解析を用いたリン酸カルシウム相転移の評価法, Journal of Bio-Integration, Vol.10, No.1, 2-13, Jul. 2020. (Link to Publication Site) ● Publication site (DOI): 10.32176/biointeg.10.1_2 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.32176/biointeg.10.1_2 (DOI: 10.32176/biointeg.10.1_2)
7.	Masaki Takeuchi : Post-Column Concentration of Anions Using Nafion Membrane Tubing, Journal of Flow Injection Analysis, Vol.34, No.2, 77-80, 2017. (Summary) In this tutorial review, the principle of on-line sample concentration by evaporation through a Nafion membrane tubing and its application to post-column concentration of anions by ion chromatography are described. As solution flows through the Nafion membrane tubing, drying nitrogen gas flows outside it to remove the solvent. The removal rate was increased with increasing sample residence time, drying gas flow rate, and device temperature. With the concentrator, the detection sensibility was improved, and the lower detection limit was obtained compared to that without the concentrator. The optimized system has successfully been applied to the determinations of perchrolate in atmospheric aerosol and orotic acid in urinary samples. (Keyword) online-concentration / anion / ion chromatography / Nafion membrane tubing (Tokushima University Institutional Repository) ● Metadata: 114306 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.34.2_77 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204657053568 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.34.2_77 (Tokushima University Institutional Repository: 114306, DOI: 10.24688/jfia.34.2_77, CiNii: 1390001204657053568)
8.	Masaki Takeuchi : 富士山頂に流入する大気をはかる, 理大科学フォーラム, Vol.384, 40-43, 2016. (Tokushima University Institutional Repository) ● Metadata: 115007 (Tokushima University Institutional Repository: 115007)
9.	Masaki Takeuchi : Manipulation of Microparticles with Standing Surface Acoustic Wave in Microfluid, Journal of Flow Injection Analysis, Vol.30, No.1, 55-56, 2013. (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.30.1_55 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001288041462144 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.30.1_55 (DOI: 10.24688/jfia.30.1_55, CiNii: 1390001288041462144)
10.	Masaki Takeuchi : 電気透析による反応試薬の導入, ぶんせき, Vol.438, No.2, 111, 2011.
11.	Masaki Takeuchi : ベランダ菜園, ぶんせき, Vol.431, No.11, 616, Nov. 2010. (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1572543026087683840 (CiNii: 1572543026087683840)
12.	Masaki Takeuchi : Atmospheric gas analyzer equipped with a self- calibration and recovery from power failure, Journal of Flow Injection Analysis, Vol.25, No.1, 85, 2008. (Keyword) フローインジェクション分析 (Link to Publication Site) ● Publication site (DOI): 10.24688/jfia.25.1_85 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390845713010285440 ● Search Scopus @ Elsevier (DOI): 10.24688/jfia.25.1_85 (DOI: 10.24688/jfia.25.1_85, CiNii: 1390845713010285440)
13.	Masaki Takeuchi : Environmental Perchlorate, ぶんせき, Vol.386, No.2, 94-95, Feb. 2007. (Keyword) perchlorate (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1570291225448156672 (CiNii: 1570291225448156672)

Proceeding of International Conference:

1.	Okochi Hiroshi, Tani Yuto, Onozuka Yosuke, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Miyazaki Akane, Kajino Mizuo, Adachi Kouji, Ishihara Yasuhiro, Iwamoto Yoko and Niida Yasuhiro : Current Status of Airborne Microplastics Research in Japan, European Aerosol Conference 2024, Tampere, Finland, Aug. 2024.
2.	Tani Yuto, Okochi Hiroshi, Onozuka Yosuke, Hayami Hiroshi, Masaki Takeuchi, Katsumi Naoya, Kajino Mizuo, Adachi Kouji, Niida Yasuhiro, Kato Shungo, Wada Ryuichi, Kamogawa Masashi, Iwazaki Hiroshi, Yokoyama Katsutaka, Nagato Takaaki, Narumi Genki, Miura Kazuhiko, Hirose Katsumi and Dokiya Yukiko : Occurrence, behavior, fate, and health impact of airborne microplastics (AMPs): Characteristics of AMPs in high altitude and polar regions (4), ACID RAIN 2020, Niigata, Jun. 2024.
3.	Moene Komatsu, Okochi Hiroshi, Tani Yuto, Onozuka Yousuke, Oshimi Motohiro, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Katsumi Naoya, Kajino Mizuo, Adachi Kouji, Ishihara Yasuhiro, Iwamoto Yoko, Niida Yasuhiro, Nakajima Ryota and Yabuki Akinori : Distribution of potentially airborne sub-100 µm marine microplastics in the surface ocean near Japan, 2nd International Symposium on Plastic Pollution in Asian Waters From Land to Ocean, Tokyo, Feb. 2024.
4.	Hitoshi Mizuguchi, Yuka Torii, Sohei Tsugita, Yukuto Ogawa, Hiten Iwamoto, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Jiro Kasahara : A Microdialysis-Integrated HPLC System Constructed Using Track-Etched Membrane Electrodes for Dopamine Monitoring in Mouse Brain, 19th Asia-Pacific International Symposium on Microscale Separations and Analysis 2023 (APCE 2023), Kuala Lumpur, Oct. 2023.
5.	Yuka Torii, Sohei Tsugita, Yukuto Ogawa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : Dopamine monitoring in a mouse brain using a microdialysis-integrated HPLC equipped with a track-etched membrane double-electrode detector, Royal Society of Chemistry Tokyo International Conference 2023 (RSC-TIC 2023), Chiba, Sep. 2023.
6.	Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, William Pipkin, Atsushi Watanabe, Chuichi Watanabe and Hitoshi Mizuguchi : Highly Sensitive Analysis of Airborne Microplastics by Splitless Pyrolysis-GC/MS, Royal Society of Chemistry Tokyo International Conference 2023 (RSC-TIC 2023), Chiba, Sep. 2023.
7.	Atsushi Watanabe, Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, William Pipkin, Kazuko Matsui and Chuichi Watanabe : Analyzing Microplastics in Airborne Particulate Matter by Pyrolysis-GC/MS, PYROASIA Symposium 2023, Kuala Lumpur, Jun. 2023.
8.	Homma Asahi, Okochi Hiroshi, Yada Takamasa, Hayami Hiroshi, Katsumi Naoya, Minami Yukiya, Kobayashi Hiroshi, Miura Kazuhiko, Kato Shungo, Wada Ryuichi, Masaki Takeuchi, Toda Kei, Yonemochi Shinichi, Dokiya Yukiko and Hatakeyama Shiro : Long-term observations of water-soluble aerosols and gases in the free troposphere and atmospheric boundary layer on Mt. Fuji for the assessment of transboundary air pollution impacts, ACID RAIN 2020, Niigata, Jun. 2023.
9.	Oshimi Motohiro, Okochi Hiroshi, Wang Yize, Endo Miu, Dairiki Mitsuo, Katsumi Naoya, Minami Yukiya, Yonemochi Shinichi, Miura Kazuhiko, Kato Shungo, Wada Ryuichi, Masaki Takeuchi, Toda Kei, Dokiya Yukiko and Hatakeyama Shiro : Long-term monitoring of cloud water chemistry in the free troposphere and boundary layer of Mt. Fuji (1), ACID RAIN 2020, Niigata, Jun. 2023.
10.	Onozuka Yosuke, Okochi Hiroshi, Tani Yuto, Yoshida Norihisa, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Katsumi Naoya, Matsuki Atsushi, Kajino Mizuo, Adachi Kouji, Ishihara Yasuhiro, Iwamoto Yoko and Niida Yasuhiro : Occurrence, behavior, fate, and health impact of airborne microplastics (AMPs)(3), ACID RAIN 2020, Niigata, Jun. 2023.
11.	Yoshida Norihisa, Okochi Hiroshi, Tani Yuto, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Yamaguchi Takashi, Katsumi Naoya, Matsuki Atsushi, Kajino Mizuo, Adachi Kouji, Ishihara Yasuhiro, Iwamoto Yoko and Niida Yasuhiro : Occurrence, behavior, fate, and health impact of airborne microplastics (2): Characteristics of AMPs at the summit of Mt. Fuji in the free troposphere, The 12th Asian Aerosol Conference 2022, Jun. 2022.
12.	Tani Yuto, Okochi Hiroshi, Yoshida Norihisa, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Yamaguchi Takashi, Katsumi Naoya, Matsuki Atsushi, Kajino Mizuo, Adachi Kouji, Ishihara Yasuhiro, Iwamoto Yoko and Niida Yasuhiro : Occurrence, behavior, fate, and health impact of airborne microplastics (1): Distribution of concentration and deposition flux in Japan, The 12th Asian Aerosol Conference 2022, Jun. 2022.
13.	Hideji TANAKA, Keiro Higuchi and Masaki Takeuchi : Development of triangular-wave controlled flow analysis and its application to the determination of high-concentration analyte without dilution, The 2021 International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA (Web), Dec. 2021.
14.	Okochi Hiroshi, Yoshida Norihisa, Tani Yuto, Fujikawa Machiko, Heli Zhao, Hayami Hiroshi, Masaki Takeuchi, Sorimachi Atsuyuki, Fujii Yusuke, Takenaka Norimichi, Miyazaki Akane, Katsumi Naoya, Kajino Mizuo, Adachi Koji, Ishihara Yasuhiro and Iwamoto Yoko : Airborne Microplastics and Health Impact (AMΦ Project), Joint Usage/Joint Research Symposium on Integrated Environmental Studies, Dec. 2021.
15.	Takamasa Yada, Hiroshi Okochi, Hiroshi Hayami, Naoya Katsumi, Yukiya Minami, Hiroshi Kobayashi, Kazuhiko Miura, Shungo Kato, Ryuichi Wada, Masaki Takeuchi, Kei Toda, Shin-ichi Yonemochi, Yukiko Dokiya and Shiro Hatakeyama : Long-term trend of acidic gases and water-soluble aerosol components in the upper atmospheric boundary layer and in the free troposphere on Mt. Fuji (1), The 2021 International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA, Dec. 2021.
16.	Mitsuo Dairiki, Hiroshi Okochi, Megumi Nakamura, Hiroshi Hayami, Naoya Katsumi, Yukiya Minami, Shinichi Yonemochi, Kazuhiko Miura, Shungo Kato, Ryuichi Wada, Masaki Takeuchi, Kei Toda, Yukiko Dokiya and Shiro Hatakeyama : Long-term trend of summer cloud water chemistry at the summit of Mt. Fuji in the free troposphere, The 2021 International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA, Dec. 2021.
17.	Heli Zhao, Hiroshi Okochi, Norihisa Yoshida, Hiroshi Hayami, Masaki Takeuchi, Atsuyuki Sotimachi, Yusuke Fujii, Norimichi Takenaka, Naoya Katsumi, Akane Miyazaki, Tomoyuki Hori, Hiroko Ogata, Youhei Itaya, Hanae Kobayashi, Norio Urayama, Yasuhiro Niida and Hideshige Takada : Atmosphere-forest interaction of airborne microplastics (AMPs) (1): Application of O-PTIR to the identification of AMPs, The 2021 International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA, Dec. 2021.
18.	Hideji TANAKA and Masaki Takeuchi : Principle and application of amplitude modulated multiplexed flow analysis, International Symposium on Miniaturized Systems for Chemical Separation and Analysis, Kunming, China, Dec. 2019.
19.	Naoki Oka, Masaki Takeuchi, Hideji TANAKA and Tatsusada Yoshida : Study on interaction between protein and ligands based on linear expression analysis of free energy change using molecular calculation: Detailed analysis of complex formation of FKBP and FK506 derivatives, 2019 China-Japan-Korea symposium on Analytical Chemistry, Yongin, Korea, Oct. 2019.
20.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : Crystallinity evaluation of mechanochemically synthesized zinc chloroapatite by powder X-ray diffractometory and attenuated total reflection - Infrared spectroscopy, 2019 China-Japan-Korea symposium on Analytical Chemistry, Yongin, Korea, Oct. 2019.
21.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : High throughput titration based on variable and fixed triangular wave controlled flow ratiometry with LED-photodiode detector and its application to quality analysis and process control of vinegar and drug, 2019 China-Japan-Korea symposium on Analytical Chemistry, Yongin, Korea, Oct. 2019.
22.	Toru Takahashi, Yuta Otsuka, Hideji TANAKA and Masaki Takeuchi : Multivariate analysis for low resolution absorbance peaks: An accelerated FIA, International JAFIA 35th Anniversary Symposium with Profs. Christian and Dasgupta & the 56th Meeting of the Japanese Association for Flow Injection Analysis, Nagoya, Oct. 2019.
23.	Daichi Nishimori, Tomohiko Kuwabara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : Determination of catecholamines by HPLC-coulometric detection using track-etched microporous membrane electrodes, RSC-Tokyo International Conference 2019, Chiba, Sep. 2019.
24.	Hiroshi Okochi, Mitsuo Dairiki, Megumi Nakamura, Shin Ogawa, Daisuke Tahara, Naoki Takemura, Takanori Nakano, Kojiro Shimada, Naoya Katsumi, Yukiya Minami, Masaki Takeuchi, Kei Toda, Shungo Kato, Ryuichi Wada, Kazuhiko Miura and Shinichi Yonemochi : Observation of cloud water chemistry in the free troposphere and the atmospheric boundary layer on Mt. Fuji (6), 8th International Conference on Fog, Fog Collection and Dew, Taipei, Jul. 2019.
25.	Mitsuo Dairiki, Hiroshi Okochi, Megumi Nakamura, Shin Ogawa, Daisuke Tahara, Naoki Takemura, Takanori Nakano, Kojiro Shimada, Naoya Katsumi, Yukiya Minami, Masaki Takeuchi, Kei Toda, Shungo Kato, Ryuichi Wada, Kazuhiko Miura and Shinichi Yonemochi : Observation of cloud water chemistry in the free troposphere and the atmospheric boundary layer on Mt. Fuji (5), 8th International Conference on Fog, Fog Collection and Dew, Taipei, Jul. 2019.
26.	Masaki Takeuchi, Hideji TANAKA, Hiroshi Okochi and Manabu Igawa : Dew occurrence and hydroxymethanesulfonate chemistry of dewwater in Yokohama, Japan, 8th International Conference on Fog, Fog Collection and Dew, Taipei, Jul. 2019.
27.	Naoki Oka, Masaki Takeuchi, Hideji TANAKA and Tatsusada Yoshida : Correlation analysis of binding free-energy change due to complex formation of FK506 derivatives with FK506 binding protein: a computational study, Pure and Applied Chemistry International Conference 2019, Bangkok, Feb. 2019.
28.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : Quality analysis and process control of vinegar and drug by feedback-based flow ratiometry, Pure and Applied Chemistry International Conference 2019, Bangkok, Feb. 2019.
29.	Hideji TANAKA, Riona Wada, Masatoshi Yanase, Keiro Higuchi and Masaki Takeuchi : Triangular-wave controlled flow analysis for determination of high-concentration analyte without dilution, Pure and Applied Chemistry International Conference 2019, Bangkok, Feb. 2019.
30.	Hitoshi Mizuguchi, Daichi Nishimori, Masamitsu Iiyama, Masaki Takeuchi and Toshio Takayanagi : High-performance liquid chromatography with a dual-electrode detector constructed using track-etched microporous membrane electrodes, 14th International Conference on Flow Analysis (Flow Analysis XIV), Bangkok, Dec. 2018.
31.	Masaki Takeuchi, Yui Shimada, Haruka Yoshikawa and Hideji TANAKA : Nafion tube-based on-line concentrator: preconcentration of perchlorate for ion chromatography, Flow Analysis XIV, Bangkok, Dec. 2018.
32.	Yuta Otsuka, Satoru Goto, Akira Ito, Masaki Takeuchi and Hideji TANAKA : Dry mechanochemical synthesis of 2 : 1 caffeine / oxalic acid cocrystals and their evaluation by powder X-ray diffraction and multivariate analysis, 3rd International Symposium on BA/BE of Oral Drug Products, Lisbon, Oct. 2018.
33.	Daichi Nishimori, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : High Performance liquid chromatography-electrochemical detection using track-etched microporous membrane electrodes, RSC Tokyo International Conference 2018, Chiba, Sep. 2018.
34.	Hideji TANAKA, Tomoko Hirasaka, Oka Sawako and Masaki Takeuchi : Flow titrimetry based on air-segmented flow ratiometry controlled with feedback-based/fixed triangular waves, Pure and Applied Chemistry International Conference 2018, Hat Yai, Thailand, Feb. 2018.
35.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : High throughput titration by feedback-based flow ratiometry and its application to analyses drugs in Japanese Pharmacopoeia, Pure and Applied Chemistry International Conference 2018, Hat Yai, Thailand, Feb. 2018.
36.	Masaki Takeuchi, Naoya Tomiyasu, Makoto Namikawa, Shin-Ichi Ohira, Hideji TANAKA, Kei Toda and Hiroshi Okochi : Online analysis of water-soluble acidic gases and anions in particulate matter at the summit of Mt. Fuji, Japan, 2017 Symposium on Atmospheric Chemistry & Physics at Mountain Sites, Gotenba, Japan, Nov. 2017.
37.	Yosuke Miyauchi, Masakazu Iwasaki, Kasumi Mitsuishi, Shin-Ichi Ohira, Masaki Takeuchi and Hiroshi Okochi : Dicarbonyl compounds in hygroscopic aerosols and cloud waters sampled at the top of Mt. Fuji, 2017 Symposium on Atmospheric Chemistry & Physics at Mountain Sites, Gotenba, Japan, Nov. 2017.
38.	Yosuke Miyauchi, Hiroshi Okochi, Kojiro Shimada, Naoya Katsumi, Yukiya Minami, Hiroshi Kobayashi, Kazuhiko Miura, Shungo Kato, Masaki Takeuchi, Kei Toda and Shinichi Yonemochi : Observation of acidic gases and aerosols in the upper atmospheric boundary layer and in the free troposphere on Mt. Fuji (2), 2017 Symposium on Atmospheric Chemistry & Physics at Mountain Sites, Gotenba, Japan, Nov. 2017.
39.	Kei Toda, Masakazu Iwasaki, Kasumi Mitsuishi, Shin-Ichi Ohira and Masaki Takeuchi : Analysis of atmospheric carbonyls in gaseous and particulate phases by using flow-based parallel plate wet denuder and particle collector: On site analysis in Kumamoto and on the top of Mt. Fuji, 21th International Conference on Flow Injection Analysis and Related Techniques, Saint Petersburg, Rossiya, Sep. 2017.
40.	Kei Toda, Masakazu Iwasaki, Kasumi Mitsuishi, Shin-Ichi Ohira, Masaki Takeuchi and Hiroshi Okochi : Analysis of atmospheric carbonyls in gaseous and particulate phases by using flow-based parallel plate wet denuder and particle collector: On site analysis in Kumamoto and on the top of Mt. Fuji, Asia/ CJK symposium on analytical science 2017, Tokyo, Japan, Sep. 2017.
41.	Hideji TANAKA, Tomoko Hirasaka and Masaki Takeuchi : Flow titration by feedback-based flow ratiometry with air segmentation, Asia/ CJK symposium on analytical science 2017, Tokyo, Japan, Sep. 2017.
42.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : High throughput titration by feedback-based flow ratiometry and its application to analysis of vinegar samples, Asia/ CJK symposium on analytical science 2017, Tokyo, Japan, Sep. 2017.
43.	Hideji TANAKA, Erina Tomiyama, Tomoko Hirasaka, Hiroya Kubo, Sawako Oka, Naoya Kakiuchi, Akihiro Fujikawa and Masaki Takeuchi : High throughput titration by air-segmented flow ratiometry, The 13th Asian Conference on Analytical Sciences, Chiang Mai, Thailand, Dec. 2016.
44.	Otsuka Yuta, Ito Akira, Masaki Takeuchi, Mitome Hajime and Hideji TANAKA : Predictive evaluation of differential scanning calorimetry curve of theophylline tablets using portable Raman spectromerer, Japan-Taiwan Medical Spectroscopy International Symposium, Awaji, Japan, Dec. 2016.
45.	Yuta Otsuka, Akira Ito, Masaki Takeuchi, Hajime Mitome and Hideji TANAKA : Predictive evaluation of differential scanning calorimetry curve of theophylline tablets using portable Raman spectrometer, Japan-Taiwan Medical Spectroscopy International Symposium, Awaji, Japan, Dec. 2016.
46.	Masaki Takeuchi, Shinya Nakagawa, Kazuaki Miyata and Hideji TANAKA : Nitric acid gas generator for air analysis, 20th International Conference on Flow Injection Analysis and Related Techniques, Mallorca, Spain, Oct. 2016.
47.	Yuta Otsuka, Akira Ito, Saki Matsumura, Masaki Takeuchi and Hideji TANAKA : Investigation on carbamazepine polymorphic transformation kinetics with attenuated total reflectance-infrared spectra and multivariate curve resolution-alternating least squares analysis, 2016 China-Japan-Korea Symposium on Analytical Chemistry, Wuyishan, China, Aug. 2016.
48.	Masaki Takeuchi, Shinya Nakagawa, Hiroki Watanabe, Yuki Miyazaki, Hideji TANAKA, Takaharu Isobe, Hiroko Ogata and Hiroshi Okochi : Water-soluble atmospheric acid gases at the summit of Mt. Fuji, Japan, monitored with parallel plate wet denuder coupled ion chromatograph, The 8th Asia Pacific Symposium on Ion Analysis, 2015.
49.	Nakagawa Shinya, Hideji TANAKA and Masaki Takeuchi : Nitric acid gas generator, The International Chemical Congress of Pacific Baisin Societies (PACIFICHEM2015), Honolulu, Dec. 2015.
50.	Hideji TANAKA, Kubo Hiroya and Masaki Takeuchi : Pretreatment of phosphorus compounds by electrogenerated cobalt(III) ions and its evaluation by flow injection analysis, The International Chemical Congress of Pacific Baisin Societies (PACIFICHEM2015), Honolulu, Dec. 2015.
51.	Hideji TANAKA and Masaki Takeuchi : Flow analysis utilizing periodically varying flow rate: feedback-based flow ratiometry and amplitude modulated multiplexed flow analysis, The International Chemical Congress of Pacific Baisin Societies (PACIFICHEM2015), Honolulu, Dec. 2015.
52.	Masaki Takeuchi, Miki Narita, Emako Takano, Kaoru Yoshioka and Hideji TANAKA : Determination of perchlorate in the atmospheric aerosol by ion chromatography, Flow Analysis Xlll, Jul. 2015.
53.	Masaki Takeuchi, Kiichi Ishimine, Naoyuki Miki, Yuki Miyazaki and Hideji TANAKA : Nafion tube-based carbonate removal device for ion chromatography, 19 th International Confere0nce on Flow Injection Analysis and Related Techniques, Fukuoka, Dec. 2014.
54.	Takeshi Ogusu, Takeshi Uemura, Katsuya Uchimoto, Masaki Takeuchi and Hideji TANAKA : Spectrophotometric determination of phosphate ion by amplitude modulated multiplexed flow analysis, 19 th International Conference on Flow Injection Analysis and Related Techniques, Fukuoka, Dec. 2014.
55.	Kei Toda, Satoru Yunoki, Akira Yanaga, Naruto Hozumi, Shin-Ichi Ohira, Masaki Takeuchi and Purnendu K. Dasgupta : Formaldehyde of hygroscopic aerosol (PM2.5), 2014 China-Japan-Korea Symposium on Analytical Chemistry, Shenyang, China, Aug. 2014.
56.	Satoshi Ogawa, Hiroshi Okochi, Takaharu Isobe, Hiroko Ogata, Toshio Nagoya, Yukiya Minami, Masaki Takeuchi, Hiroshi Kobayashi, Kazuhiko Miura, Shungo Kato, Mitsuo Uematsu and Natsumi Umezawa : Observation of acidic trace gases, gaseous mercury, and water-soluble inorganic aerosols species at the top and the foot of Mt. Fuji, International Conference of Asian Environmental Chemistry 2014, 2014.
57.	Yuta Otsuka, Masaki Takeuchi, Makoto Otsuka, B. Ben-Nissan and Hideji TANAKA : Investigation on relationship between CO2 concentration and self-setting TeCP-DCPD apatite cement formation by ATR-IR and chemoinfomatics, The 13th Asian BioCeramics Symposium (ABC2013), Kyoto, Japan, Dec. 2013.
58.	Satoru Yunoki, Akira Yanaga, Shin-Ichi Ohira, Masaki Takeuchi and Kei Toda : Measurement of gaseous and particulate formaldehyde in the atmosphere, ASIANALYSIS XII, Aug. 2013.
59.	Masaki Takeuchi, Kaoru Yoshioka, Yusuke Toyama, Ai Kagami and Hideji TANAKA : On-line measurement of perchlorate in atmospheric aerosol based on ion chromatograph coupled with particle collector and post-column concentrator, 6th Shanghai International Symposium on Analytical Chemistry, Shanghai, China, Oct. 2012.
60.	Hideji TANAKA, Takeshi Ogusu, Katsuya Uchimoto and Masaki Takeuchi : Determination of phosphate ion in water samples by air segmentation - amplitude modulated multiplexed flow analysis, 6th Shanghai International Symposium on Analytical Chemistry, Shanghai, China, Oct. 2012.
61.	Masaki Takeuchi, Masato Izumi, Mizuki Watanabe, Tomoaki Obata, Kei Toda and Hideji TANAKA : Collection of hydrogen sulfide gas with surface treating annular denuder, Flow Analysis Xll, Thessaloniki, Greece, Sep. 2012.
62.	Takeshi Ogusu, Masaki Takeuchi and Hideji TANAKA : Air segmented amplitude modulated multiplexed flow analysis with no deaeration process. Determination of phosphate ion, Flow Analysis Xll, Thessaloniki, Greece, Sep. 2012.
63.	Hideji TANAKA, Yohei Kurokawa, Masaki Takeuchi and Akira Ohbuchi : Amplitude modulated multiplexed flow analysis for simultaneous determination of multiple analytes. Determination of ferrous and ferric ions, Flow Analysis Xll, Thessaloniki, Greece, Sep. 2012.
64.	Masaki Takeuchi, Yuki Miyazaki, Hiromichi Tsunoda and Hideji TANAKA : Acid gas measurement with parallel plate wet denuder coupled ion chromatograph, Pure and Applied Chemistry International Conference 2012, Chiang Mai, Thailand, Jan. 2012.
65.	Masaki Takeuchi, Yuki Miyazaki, Hiromichi Tsunoda and Hideji TANAKA : Automated acid gas monitor with parallel plate wet denuder, JAIMA Discussion on Analytical Science and Technology 2011, Chiba, Japan, Sep. 2011.
66.	Hideji TANAKA, Ogusu Takeshi, Inui Koji and Masaki Takeuchi : Air-segmented amplitude modulated multiplexed flow analysis, The 14th Asian Chemical Congress 2011, Bangkok, Thailand, Sep. 2011.
67.	Masaki Takeuchi, Hiromichi Tsunoda and Hideji TANAKA : Nafion membrane tube based concentrator for water soluble acid monitoring system, IUPAC International Congress on Analytical Sciences 2011, kyoto, Japan, May 2011.
68.	Hideji TANAKA, Kurokawa Yohei and Masaki Takeuchi : Amplitude modulated multiplexed flow analysis for simultaneous determination, IUPAC International Congress on Analytical Sciences 2011, Kyoto, Japan, May 2011.
69.	Hideji TANAKA, Inui Koji and Masaki Takeuchi : Air segmented amplitude modulated multiplexed flow analysis, IUPAC International Congress on Analytical Sciences 2011, Kyoto, Japan, May 2011.
70.	Masaki Takeuchi, Kaoru Yoshioka, Yusuke Toyama, Ai Kagami and Hideji TANAKA : Automated analysis for perchlorate in atmospheric aerosol, 2010 International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2010), Honolulu, Dec. 2010.
71.	Hideji TANAKA, Koji Inui, Takeshi Ogusu, Yohei Kurokawa and Masaki Takeuchi : Air-segmented amplitude modulated flow analysis., 2010 International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2010), Honolulu, Dec. 2010.
72.	Masaki Takeuchi, Yoshimi Shiramizu, Masaru Tanaka, Hiromichi Tsunoda, Hideji TANAKA, Norikazu Namiki and Shuji Fujii : Parallel plate wet denuder coupled ion chromatography for near real time monitoring of acids, ammonia and amines in clean room and equipments., ISSM2010, Tokyo, Oct. 2010.
73.	Hideji TANAKA, Takuto Mima, Hirokazu Takayasu, Yohei Kurokawa and Masaki Takeuchi : Amplitude Modulated Multiplexed Flow Analysis. Application to Simultaneous Determination of Ferrous and Ferric Ions., Flow Analysis XI, Sep. 2009.
74.	Hideji TANAKA, Takeshi Uemura, Takeshi Ogusu and Masaki Takeuchi : Determination of Phosphate Ion by Amplitude Modulated Flow Analysis With Lock-In Detection., Flow Analysis XI, Sep. 2009.
75.	Takuto Mima, Masaki Takeuchi and Hideji TANAKA : Application of Amplitude Modulated Multiplexed flow Analysis for the Simultaneous Determination of Multiple Analytes, 15th International Conference on Flow Injection Analysis Including Related Techniques (ICFIA 2008) & 25th Anniversary Meeting of Japanese Association for Flow Injection Analysis, Nagoya, Sep. 2008. (Keyword) Flow analysis
76.	Masaki Takeuchi, Jason V Dyke, Purnendu K Dasgupta, Hideji TANAKA and Kannan Srinivasan : Postcolumn Concentration in Ion Chromatography, 15th International Conference on Flow Injection Analysis Including Related Techniques (ICFIA 2008) & 25th Anniversary Meeting of Japanese Association for Flow Injection Analysis, Nagoya, Sep. 2008. (Keyword) Postcolumn concentration / Ion chromatography
77.	Shin-Ichi Ohira, Masaki Takeuchi, Guanqun Song, Ignacio Villanueva-Fierro and Purnendu K Dasgupta : Noncontact Conductivity and Liquid Core Waveguide Based Fluorescence Detectors for Capillary Scale Analysis, International Ion Chromatography Symposium (IICS) 2008, Portland, Oregon, Sep. 2008. (Keyword) Noncontact conductivity
78.	Hideji TANAKA, Takuto Mima, Hitoshi Iida and Masaki Takeuchi : Application of Multiplex Controlled Flow Ratiometry for the Simultaneous Determination of Ferrous and Ferric Ions, International Symposium on Flow-Based Analysis Vll, Chiang Mai, Dec. 2007. (Keyword) Flow analysis
79.	Hideji TANAKA, Tursunjan Aydan, Ayumi Kitagawa, Masahiro Ono and Masaki Takeuchi : Application of Feedback-Based Flow Ratimetry to Simultaneous Determination of Calcium and Magnesium Ions by Chelatometry Using Photometric and Potentiometic Detectors, International Symposium on Flow-Based Analysis Vll, Chiang Mai, Dec. 2007. (Keyword) Flow analysis
80.	Bingcheng Yang, Masaki Takeuchi and Purnendu K Dasgupta : On-Line Gas-Free Electrodialytic Microscale Generator for Ionic Compounds, International Symposium on Flow-Based Analysis Vll, Chiang Mai, Dec. 2007. (Keyword) On-Line / Generator
81.	Rahmat SM Ullah, Masaki Takeuchi and Purnendu K Dasgupta : A small footprint gas particle ion chromatography system, An International Specialty Conference Sponsored by the American Association for Aerosol Research, Atlanta, Feb. 2005.
82.	Purnendu K Dasgupta, Masaki Takeuchi and Rahmat SM Ullah : Continuous measurement of ammonia and acid gases, particulate ammonium and anions, An International Specialty Conference Sponsored by the American Association for Aerosol Research, Atlanta, Feb. 2005.
83.	Hiroshi Okochi, Masanori Kataniwa, Daisuke Sugimoto, Masaki Takeuchi and Manabu Igawa : Enhanced dissolution of volatile organic compounds into urban dew water collected in Yokohama, Japan, The 3rd International Conference on Fog, Fog Collection and Dew, Cape town, Oct. 2004.
84.	Masaki Takeuchi, Tetuo Hasegawa, Hiroshi Okochi and Manabu Igawa : Measurement of Weak Acid in Dew-water and Comparison in Rain- and Fog-water, Second International Conference on Fog and Fog Collection, St. John's Newfoundland, Jul. 2001.
85.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Dew-water chemistry and its dominant factors, 6th International Conference on Acidic Deposition, Tsukuba, Dec. 2000.
86.	Masaki Takeuchi, Hiroshi Okochi and Manabu Igawa : Chemical Components and Acidification Mechanism of Dew-Water, Oxidants / Acidic Species and Forest Decline in East Asia, Nagoya, Nov. 1999.
87.	Hiroshi Okochi, Masaki Takeuchi and Manabu Igawa : Effect of acid deposition on urban dew chemistry in Yokohama, Japan, 1st International Conference on Fog and Fog Collection, Vancouver, Jul. 1999.

Proceeding of Domestic Conference:

1.	Yuka Maeta, Haruka Tanaka, Hideji TANAKA and Masaki Takeuchi : ポータブルなNH3ガスモニタの開発, 第84回分析化学討論会, May 2024.
2.	Ryosuke Niki, Maria Shichijoh, Kazumasa Okamoto, Tohru Takahashi, 大平慎一, Hitoshi Mizuguchi, Hideji TANAKA and Masaki Takeuchi : フィードバック標準添加法による海水中亜硝酸イオン，硝酸イオンの自動化測定, 第84回分析化学討論会, May 2024.
3.	Kyosuke Kinoshita, MAEKAWA Taiga, Mao Kashimoto, Erina Matsuda, IKAWA Ryotaroh, ASAI Yuki, TAKEDA Hiroto, NAEMURA Mai, Hitoshi Mizuguchi, 小野塚洋介, 大河内博, Hideji TANAKA and Masaki Takeuchi : 熱分解GC/MSを用いる大気マイクロプラスチックの定量, 第84回分析化学討論会, May 2024.
4.	大河内博, 谷悠人, 小野塚洋介, 王一澤, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの実態解明と健康影響評価:AMΦプロジェクトのご紹介, 第84回分析化学討論会, May 2024.
5.	Yuka Torii, Sohei Tsugita, Yukuto Ogawa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター二重電極を用いる微小透析/HPLCシステムー脳内ドーパミンモニタリングシステムの開発ー, 第59回フローインジェクション分析講演会, Nov. 2023.
6.	Sohei Tsugita, Yuka Torii, Yukuto Ogawa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜電極を用いるHPLC/電量検出法によるドーパミン放出挙動のin vivoモニタング, 第59回フローインジェクション分析講演会, Nov. 2023.
7.	Hiroto Takeda, Mai Naemura, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Norio Teramae, William Pipkin, Atsushi Watanabi, Chuichi Watanabe and Hitoshi Mizuguchi : スプリットレス熱分解GC/MSによる大気マイクロプラスチックの高感度分析法の開発, 第59回フローインジェクション分析講演会, Nov. 2023.
8.	Sohei Tsugita, Yuka Torii, Yukuto Ogawa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜電極を用いるHPLC/電量検出法によるin vivoモニタリング -マウス線条体でのドーパミンの放出制御の観測-, 2023年日本化学会中国四国支部大会山口大会, Nov. 2023.
9.	Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, Pipkin William, Kazuko Matsui, Atsushi Watanabe, Chuichi Watanabe and Hitoshi Mizuguchi : スプリットレス熱分解GC/MSによる大気中の微量マイクロプラスチック分析における測定感度の向上について, 第28回高分子分析討論会, Nov. 2023.
10.	Kyosuke Kinoshita, TAKEDA Hiroto, NAEMURA Mai, Hitoshi Mizuguchi, Mao Kashimoto, Erina Matsuda, IKAWA Ryotaroh, ASAI Yuki, MAEKAWA Taiga, Hideji TANAKA and Masaki Takeuchi : 徳島市における大気マイクロプラスチックの動態, 第59回フローインジェクション分析講演会, Nov. 2023.
11.	NAGANO Sota, Aoi Iwasa, Hideji TANAKA and Masaki Takeuchi : FIAによる高濃度試料の非希釈分析, 第59回フローインジェクション分析講演会, Nov. 2023.
12.	MAEKAWA Taiga, Kyosuke Kinoshita, TAKEDA Hiroto, NAEMURA Mai, Mao Kashimoto, Erina Matsuda, IKAWA Ryotaroh, ASAI Yuki, Hitoshi Mizuguchi, 大河内博, Hideji TANAKA and Masaki Takeuchi : 熱分解GC/MSを用いた大気マイクロプラスチックの分析 ―大気マイクロプラスチック捕集フィルターの検討―, 第59回フローインジェクション分析講演会, Nov. 2023.
13.	Erina Matsuda, Mao Kashimoto, Kyosuke Kinoshita, IKAWA Ryotaroh, ASAI Yuki, MAEKAWA Taiga, 谷悠人, 大河内博, 後藤充貴, 反町篤行, Hideji TANAKA and Masaki Takeuchi : µFT-IRを用いた大気中マイクロプラスチック迅速分析法の検討, 日本分析化学会第72年会, Sep. 2023.
14.	Aoi Iwasa, Hideji TANAKA and Masaki Takeuchi : フローインジェクション分析法の広ダイナミックレンジ化, 日本分析化学会第72年会, Sep. 2023.
15.	熊澤涛, 大河内博, 谷悠人, 速水洋, 反町篤行, 須永奈都, 宮崎あかね, Masaki Takeuchi, 藤井佑介, 竹中規訓, 勝見尚也, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(11), 第64回大気環境学会年会, Sep. 2023.
16.	押見基央, 大河内博, 王一澤, 速水洋, 勝見尚也, 皆巳幸也, 米持真一, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した自由対流圏及び大気境界層における雲水化学観測(9), 第64回大気環境学会年会, Sep. 2023.
17.	本間旭陽, 大河内博, 矢田崇将, 速水洋, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 米持真一, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの長期観測(7), 第64回大気環境学会年会, Sep. 2023.
18.	谷悠人, 大河内博, 吉田昇永, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, 北野洸太郎, 山口高志, 池盛文数, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(9): 日本全国における大気中マイクロプラスチック濃度分布と発生源・輸送経路の解明, 第64回大気環境学会年会, Sep. 2023.
19.	小野塚洋介, 大河内博, 谷悠人, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 山口高志, 池盛文数, 勝見尚也, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子, 新居田恭弘, 櫻井昌文, 齋藤純一 and 小林紘子 : 大気中マイクロプラスチックの起源・動態・健康影響(10), 第64回大気環境学会年会, Sep. 2023.
20.	Yuka Torii, Sohei Tsugita, Yukuto Ogawa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター二重電極を用いたHPLCおよび微小透析による脳内ドーパミンモニタリングシステムの開発, 第25回活性アミンに関するワークショップ, Aug. 2023.
21.	Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, William Pipkin, Kazuko Matsui, Atsushi Watanabe, Chuichi Watanabe and Hitoshi Mizuguchi : 大気マイクロプラスチック分析へのスプリットレス熱分解GC/MSの適用, マテリアルライフ学会第34回研究発表会, Jul. 2023.
22.	Yuka Torii, Yukuto Ogawa, Sohei Tsugita, Tsukasa Sato, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を用いたHPLCおよび微小透析法によるマウス線条体でのドーパミン放出挙動の解析, 第83回分析化学討論会, May 2023.
23.	Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, Pipkin William, Kazuko Matsui, Atsushi Watanabe, Chuichi Watanabe and Hitoshi Mizuguchi : スプリットレス熱分解GC/MSによる大気マイクロプラスチックの分析, 第83回分析化学討論会, May 2023.
24.	熊澤涛, 大河内博, 趙鶴立, 谷悠人, 速水洋, 反町篤行, Masaki Takeuchi, 藤井佑介, 竹中規訓, 山口高志, 池森文数, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(7): 放射性物質によって汚染された森林におけるAMPs の動態, 第31回環境化学討論会, May 2023.
25.	小松萌音, 大河内博, 谷悠人, 小野塚洋介, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, Masaki Takeuchi, 山口高志, 池森文数, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(8), 第31回環境化学討論会, May 2023.
26.	押見基央, 大河内博, 速水洋, 王一澤, 勝見尚也, 皆巳幸也, 米持真一, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した自由対流圏および大気境界層における雲水化学特性(8), 第31回環境化学討論会, May 2023.
27.	本間旭陽, 大河内博, 矢田崇将, 速水洋, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 米持真一, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの長期観測(6), 第31回環境化学討論会, May 2023.
28.	小野塚洋介, 大河内博, 谷悠人, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 山口高志, 池盛文数, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(6), 第31回環境化学討論会, May 2023.
29.	Hideji TANAKA, Naoya Kakiuchi, Junya Ochiai and Masaki Takeuchi : デジタルマイクロスコープを用いる動画撮影・測色法の開発とフィードバック制御フローレイショメトリーへの応用, 第58回フローインジェクション分析講演会, Nov. 2022.
30.	Ippei Moriguchi, Tomoyo Taniguchi, Masaki Takeuchi and Hideji TANAKA : デジタルマイクロスコープを用いる液滴の動画撮影・測色検出法の開発とリン酸イオン定量への応用, 第58回フローインジェクション分析講演会, Nov. 2022.
31.	Yukuto Ogawa, Sohei Tsugita, Torii Yuka, Tsukasa Sato, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : マウス線条体ドーパミンのin vivo測定のためのHPLC/トラックエッチ膜電量検出装置の開発, 第58回フローインジェクション分析講演会, Nov. 2022.
32.	Yuka Torii, Yukuto Ogawa, Sohei Tsugita, Hiten Iwamoto, Tsukasa Sato, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : 微小透析およびHPLCによるマウス線条体でのドーパミン放出挙動の解析, 第58回フローインジェクション分析講演会, Nov. 2022.
33.	SOHEI Tsugita, Yukuto Ogawa, Yuka Torii, Sato Tsukasa, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター二重電極を検出器とするキャピラリーHPLCによるマウス脳内ドーパミンのin vivo測定, 第58回フローインジェクション分析講演会, Nov. 2022.
34.	Takeda Hiroto, Kinoshita Kyosuke, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, Pipkin William, Kazuko Matsui, Atsushi Watanabe, Chuichi Watanabe and Hitoshi Mizuguchi : 熱分解 GC/MS による大気粉塵中のプラスチック成分の分析, 2022年日本化学会中国四国支部大会, Nov. 2022.
35.	ogawa Yukuto, Tsugita Sohei, Torii Yuka, Sato Tsukasa, Iwamoto Hiten, Jiro Kasahara, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜電極を用いるHPLC/電量検出法によるマウス線条体ドーパミンのin vivoモニタリング, 2022年日本化学会中国四国支部大会広島大会, Nov. 2022.
36.	Madoka Nishimura, Yukari Nakaya, Hideji TANAKA and Masaki Takeuchi : 過塩素酸イオンのフロー分析; イオンクロマトグラフ vs. FIA, 第58回フローインジェクション分析講演会, Nov. 2022.
37.	Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, Pipkin William, Kazuko Matsui, Atsushi Watanabe and Chuichi Watanabe : 石英繊維フィルターに捕集した大気マイクロプラスチックの熱分解GC/MSによる分析, 第27回高分子分析討論会, Oct. 2022.
38.	Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Masaki Takeuchi, Toshio Takayanagi, Hajime Ohtani, Norio Teramae, William Pipkin, Kazuko Matsui and Chuichi Watanabe : 熱分解 GC/MSによる分級捕集した大気浮遊マイクロプラスチックの分析, 日本分析化学会第71年会, Sep. 2022.
39.	Taiga Inai, Ayumi Tabata, Masaki Takeuchi and Hideji TANAKA : 液滴を光学セルとして用いるフロー分析法の開発とリン酸イオン定量への応用, 日本分析化学会第71年会, Sep. 2022.
40.	Naoya Kakiuchi, Junya Ochiai, Masaki Takeuchi and Hideji TANAKA : RGB単位ベクトル間の内積に基づく変色判定; フィードバック制御フローレイショメトリーによる局方医薬品の滴定, 日本分析化学会第71年会, Sep. 2022.
41.	大河内博, 谷悠人, 吉田昇永, 藤川真智子, 趙鶴立, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, 北野洸太郎, 宮崎あかね, 須永奈都, 羽山伸一, 徳長ゆり香, 山口高志, 勝見尚也, 松木篤, 池盛文数, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子, 新居田恭弘, 小林華栄 and 浦山憲雄 : 大気中マイクロプラスチックの実態解明と健康影響:現状と展望, 第63回大気環境学会年会, Sep. 2022.
42.	Masaki Takeuchi, Hitoshi Mizuguchi, Hiroto Takeda, Kyosuke Kinoshita, Hideji TANAKA, 大河内博, 大谷肇, 寺前紀夫, William Pipkin, 松井和子 and 渡辺忠一 : 熱分解GC/MSの大気マイクロプラスチックへの適用, 第63回大気環境学会年会, Sep. 2022.
43.	Mao Kashimoto, Erina Matsuda, Kyosuke Kinoshita, Hiroto Takeda, Hitoshi Mizuguchi, 谷悠人, 大河内博, Hideji TANAKA and Masaki Takeuchi : 大気中マイクロプラスチック分析における前処理の迅速化, 第63回大気環境学会年会, Sep. 2022.
44.	Naoto Kawamitsu, Kaho Maeda, Hideji TANAKA and Masaki Takeuchi : ウェットデニューダーとFIAを組み合わせたSO2測定システムの開発, 第63回大気環境学会年会, Sep. 2022.
45.	王一澤, 大河内博, 吉田昇永, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 山口高志, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(6)):雲水中マイクロプラスチック, 第63回大気環境学会年会, Sep. 2022.
46.	谷悠人, 大河内博, 吉田昇永, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, 北野洸太郎, 山口高志, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(5), 第63回大気環境学会年会, Sep. 2022.
47.	Hitoshi Mizuguchi, Masaki Takeuchi, Hiroto TAKEDA, Kyosuke KINOSHITA, Mai MATSUEDA, Norio TERAMAE, Hajime OTANI and Chuichi WATANABE : 熱分解-GC/MSによる大気浮遊粒子状物質中のマイクロプラスチックの分析, マテリアルライフ学会第33回研究発表会, Jul. 2022.
48.	Yuka Maeta, Haruka Tanaka, Hideji TANAKA and Masaki Takeuchi : ポータブルなオンラインNH3ガス分析システムの開発と実大気への応用, 第28回中国四国支部分析化学若手セミナー, Jun. 2022.
49.	Kyosuke Kinoshita, Hiroto Takeda, Hitoshi Mizuguchi, Mao Kashimoto, Erina Matsuda, Hideji TANAKA and Masaki Takeuchi : Py-GC/MSを用いた大気マイクロプラスチックの分析, 第28回中国四国支部分析化学若手セミナー, Jun. 2022.
50.	Ryosuke Niki, Maria Shichijoh, Hideji TANAKA and Masaki Takeuchi : 環境中亜硝酸イオンのフローインジェクション吸光光度法における共存物質の干渉, 第28回中国四国支部分析化学若手セミナー, Jun. 2022.
51.	小野塚洋介, 大河内博, 吉田昇永, 谷悠人, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 山口高志, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(4): 自由対流圏大気中マイクロプラスチックの特徴, 第30回環境化学討論会, Jun. 2022.
52.	谷悠人, 大河内博, 吉田昇永, 速水洋, Masaki Takeuchi, Mao Kashimoto, 反町篤行, 藤井佑介, 竹中規訓, 北野洸太郎, 山口高志, 勝見尚也, 松木篤, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子 and 新居田恭弘 : 大気中マイクロプラスチックの起源・動態・健康影響(3): 日本全国におけるAMPs濃度および大気沈着量分布, 第30回環境化学討論会, Jun. 2022.
53.	Madoka Nishimura, Yukari Nakaya, Masaki Takeuchi and Hideji TANAKA : イオンクロマトグラフィーによる河川水中過塩素酸イオン分析法の開発(2), 第29回クロマトグラフィーシンポジウム, Jun. 2022.
54.	HONOKA Maie, Naoya Kakiuchi, Junya Ochiai, Masaki Takeuchi and Hideji TANAKA : デジタル画像のRGB単位ベクトル間の内積，色相，および輝度を用いる指示薬の変色の判定とフロー滴定への応用, 第82回分析化学討論会, May 2022.
55.	Naoya Kakiuchi, Junya Ochiai, Masaki Takeuchi and Hideji TANAKA : RGB単位ベクトル間の内積に基づく指示薬の変色判定とフロー滴定への応用, 第82回分析化学討論会, May 2022.
56.	Tsugita Sohei, Ogawa Yukuto, Sato Tsukasa, Iwamoto Hiten, Jiro Kasahara, Masaki Takeuchi, Masamitsu IIYAMA, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター二重電極を検出器とする微小透析法-HPLCによるドーパミンのin vivo測定, The 82th symposium of JSAC, May 2022.
57.	大河内博, 吉田昇永, 藤川真智子, 趙鶴立, 谷悠人, 速水洋, Masaki Takeuchi, 反町篤行, 藤井佑介, 竹中規訓, 宮崎あかね, 梶野瑞王, 足立光司, 石原康宏 and 岩本洋子 : 大気中マイクロプラスチックの実態解明と健康影響, 日本薬学会142年会, 2022.
58.	Masaki Takeuchi, Serika Okabe and Hideji TANAKA : 溶媒留去/オンライン濃縮法による陰イオンのポストカラム濃縮, 第37回イオンクロマトグラフィー討論会, Dec. 2021.
59.	Masaki Takeuchi : フローインジェクション分析法の迅速・広ダイナミックレンジ化への挑戦, 第57回フローインジェクション分析講演会, Oct. 2021.
60.	Haruka Tanaka, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : ポータブルなオンラインNH3ガスモニタの開発, 第57回フローインジェクション分析講演会, Oct. 2021.
61.	Maria Shichijoh, Kazumasa Okamoto, Miharu Nomura, Tohru Takahashi, 大平慎一, Hitoshi Mizuguchi, Hideji TANAKA and Masaki Takeuchi : フィードバック標準添加法による環境水中亜硝酸イオンの自動化測定, 第57回フローインジェクション分析講演会, Oct. 2021.
62.	Serika Okabe, Kazumasa Okamoto, Hideji TANAKA and Masaki Takeuchi : ナフィオンチューブを用いた溶媒留去/オンライン濃縮法の高性能化, 第57回フローインジェクション分析講演会, Oct. 2021.
63.	Ayumi Tabata, Masaki Takeuchi and Hideji TANAKA : LED-フォトセンサアンプを用いた液滴光度検出フロー分析法の開発, 第57回フローインジェクション分析講演会, Oct. 2021.
64.	Tomoyo Taniguchi, Ippei Moriguchi, Masaki Takeuchi and Hideji TANAKA : -, 第57回フローインジェクション分析講演会, Oct. 2021.
65.	Yukuto Ogawa, Tsukasa Satoh, Hiten Iwamoto, Jiro Kasahara, Masaki Takeuchi, 飯山真充, Toshio Takayanagi and Hitoshi Mizuguchi : 微小透析法-キャピラリーHPLC-トラックエッチ膜フィルター電量検出装置の開発と脳内ドーパミンのin situ測定, 日本分析化学会第70年会, Sep. 2021.
66.	Ayumi Tabata, Masaki Takeuchi and Hideji TANAKA : 流路末端に生成する液滴を光学セルとして用いる吸光光度検出法の開発, 日本分析化学会第70年会, Sep. 2021.
67.	Tomoyo Taniguchi, Ippei Moriguchi, Masaki Takeuchi and Hideji TANAKA : 液滴の動画撮影・RGB画像検出に基づくフロー分析法の開発, 日本分析化学会第70年会, Sep. 2021.
68.	石川翔, 大河内博, 速水洋, 勝見尚也, 皆巳幸也, Masaki Takeuchi, 戸田敬, 加藤俊吾, 三浦和彦, 小林拓, 和田龍一, 南齋勉, 土器屋由紀子, 畠山史郎, 山本祐志 and 三阪和弘 : 富士山南東麓における無人航空機を用いた揮発性有機化合物の鉛直観測(1), 第62回大気環境学会年会, Sep. 2021.
69.	矢田崇将, 大河内博, 大力充雄, 速水洋, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 米持真一, 荒井豊明, 福島颯太, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの長期観測(4), 第62回大気環境学会年会, Sep. 2021.
70.	吉田昇永, 大河内博, 速水洋, 新居田恭弘, 小林華栄, 浦山憲雄, 緒方裕子, 勝見尚也, 皆巳幸也, 宮崎あかね, Masaki Takeuchi, 戸田敬, 三浦和彦, 加藤俊吾, 小林拓, 和田龍一 and 高田秀重 : 大気中マイクロプラスチックの分析法確立と動態解明(3):雲水および雨水を中心に, 第62回大気環境学会年会, Sep. 2021.
71.	趙鶴立, 大河内博, 吉田昇永, 速水洋, 勝見尚也, Masaki Takeuchi, 宮崎あかね, 緒方祐子, 板谷庸平, 小林華栄, 浦山憲雄, 新居田恭弘 and 高田秀重 : 光熱変換赤外分光法(O-PTIR)を用いた冬季富士山南東麓における大気中マイクロプラスチックの特徴, 第62回大気環境学会年会, Sep. 2021.
72.	大河内博, 吉田昇永, 藤川真智子, 趙鶴立, 谷悠人, 速水洋, Masaki Takeuchi, 反町篤行, 藤井祐介, 竹中規訓, 梶野瑞王, 足立光司, 石原康宏, 岩本洋子, 勝見尚也, 宮崎あかね, 高田秀重, 緒方裕子, 板谷庸平, 新居田恭弘, 小林華栄 and 浦山憲雄 : 大気中マイクロプラスチックの実態解明と健康影響, 第37回エアロゾル科学・技術研究討論会, Aug. 2021.
73.	谷悠人, 大河内博, 吉田昇永, 速水洋, 新居田泰弘, 板谷庸平, 緒方裕子, 勝見尚也, Masaki Takeuchi and 高田秀重 : 大気中マイクロプラスチック採取・前処理・迅速定量法の確立, 第29回環境化学討論会, Jun. 2021.
74.	Madoka Nishimura, Yukari Nakaya, Masaki Takeuchi and Hideji TANAKA : イオンクロマトグラフィーによる河川水中過塩素酸イオン分析法の開発, 第28回クロマトグラフィーシンポジウム, Jun. 2021.
75.	Haruka Tanaka, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : ポータブルなオンラインNH3ガス分析システムの開発, 第28回クロマトグラフィーシンポジウム, Jun. 2021.
76.	Haruka Ogawa, Tatsuya Oda, Hideji TANAKA and Masaki Takeuchi : 水溶性酸性ガス追跡システムのポータブル化, 第27回中国四国支部分析化学若手セミナー, Jun. 2021.
77.	Aoi Iwasa, Masatoshi Yanase, Hideji TANAKA and Masaki Takeuchi : 高速フーリエ変換によるフローインジェクション分析法の広ダイナミックレンジ化, 第27回中国四国支部分析化学若手セミナー, Jun. 2021.
78.	矢田崇将, 大河内博, 大力充雄, 速水洋, 勝見尚也, Masaki Takeuchi, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 米持真一, 荒井豊明, 福島颯太, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの長期観測(5), 第29回環境化学討論会, Jun. 2021.
79.	Heli Zhao, 大河内博, 吉田昇永, 速水洋, 勝見尚也, Masaki Takeuchi, 宮崎あかね, 緒方祐子, 板谷庸平, 小林華栄, 浦山憲雄, 新居田恭弘 and 高田秀重 : 光熱変換赤外分光法(O-PTIR)を用いた冬季富士山南東麓における大気中マイクロプラスチック観測, 第29回環境化学討論会, Jun. 2021.
80.	柿内直哉, 落合惇也, Masaki Takeuchi and Hideji TANAKA : 医薬品定量のためのデジタル画像処理によるフロー滴定, 第59回日本薬学会・日本薬剤師会・日本病院薬剤師会中国四国支部学術大会, Dec. 2020.
81.	Junya Ochiai, Sawako Oka, Masaki Takeuchi and Hideji TANAKA : フィードバック/固定三角波制御フローレイショメトリーによる局法医薬品の定量; 気節-非相分離検出法導入による信頼性の向上, 第59回日本薬学会・日本薬剤師会・日本病院薬剤師会中四国支部学術大会, Nov. 2020.
82.	Masatoshi Yanase, Riona Wada, Masaki Takeuchi and Hideji TANAKA : 三角波制御振幅変調フロー分析法による試薬消費量低減; 全鉄定量による検証, 第59回日本薬学会・日本薬剤師会・日本病院薬剤師会中四国支部学術大会, Nov. 2020.
83.	大力充雄, 大河内博, 中村恵, 小川新, 田原大祐, 竹村尚樹, 緒方裕子, 勝見尚也, 皆巳幸也, 米持真一, 三浦和彦, 加藤俊吾, 小林拓, 和田龍一, Masaki Takeuchi, 戸田敬, 鴨川仁, 土器屋由紀子 and 畠山史郎 : 富士山頂における夏季の自由対流圏雲水化学に関する長期トレンド, 気象学会2020年度秋季大会, Oct. 2020.
84.	Masatoshi Yanase, Riona Wada, Masaki Takeuchi and Hideji TANAKA : 三角波制御振幅変調フロー分析法による高濃度試料の非希釈分析, 第80回分析化学討論会, May 2020.
85.	Junya Ochiai, Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : ディジタル画像処理RGB検出法を導入したフィードバック制御フローレイショメトリーによるハイスループット滴定, 第80回分析化学討論会, May 2020.
86.	Naoya Kakiuchi, Junya Ochiai, Masaki Takeuchi and Hideji TANAKA : RGB値に基づく検出器を利用したデジタル画像処理による医薬品のフロー滴定, 日本薬学会140年会, Mar. 2020.
87.	Hideji TANAKA, Riona Wada, Masatoshi Yanase, 樋口慶郎 and Masaki Takeuchi : 高濃度試料の非希釈分析を目的とする三角波制御振幅変調フロー分析法の開発, 日本薬学会140年会, Mar. 2020.
88.	Daichi Nishimori, Tomohiko Kuwabara, Masaki Takeuchi, 飯山真充, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を用いるキャピラリーHPLC-電量検出法の開発, 2019年日本化学会中国四国支部大会, Nov. 2019.
89.	Nishimori Daichi, Tomohiko Kuwabara, Masaki Takeuchi, Iiyama Masamitsu, Toshio Takayanagi and Hitoshi Mizuguchi : HPLC-coulometric detection using track etched microporous membrane electrodes and its aplication to the determination of catecholamines, International JAFIA 35th Anniversary Symposium with Profs. Christian and Dasgupta & the 56th Meeting of the Japanese Association for Flow Injection Analysis, Oct. 2019.
90.	Riona Wada, Masaki Takeuchi and Hideji TANAKA : 高濃度試料の分析を目的とした三角波制御フロー分析法の研究, 日本分析化学会第68年会, Sep. 2019.
91.	Aiko Miyazaki, Naoya Kakiuchi, Kazumasa Okamoto, Masaki Takeuchi and Hideji TANAKA : フローレイショメトリーに基づくハイスループット滴定法の開発と日本薬局方医薬品定量への応用, 日本分析化学会第68年会, Sep. 2019.
92.	Yukari Nakaya, Miki Narita, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフィーによる河川水中の過塩素酸イオン分析法の検討, 日本分析化学会第68年会, Sep. 2019.
93.	Kaho Maeda, Makoto Namikawa, Naoya Tomiyasu, Hideji TANAKA and Masaki Takeuchi : ミストチャンバー法による徳島市内の大気粒子状物質のオンライン分析, 日本分析化学会第68年会, Sep. 2019.
94.	Nishimori Daichi, Tomohiko Kuwabara, Masaki Takeuchi, Iiyama Masamitsu, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を用いるHPLC-電気化学検出によるカテコールアミンのクーロメトリー検出, 日本分析化学会第68年会, Sep. 2019.
95.	大力充雄, 大河内博, 中村恵, 勝見尚也, 皆巳幸也, 米持真一, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した自由対流圏および大気境界層における雲水化学特性(6), 第60回大気環境学会年会, Sep. 2019.
96.	村上周平, 大河内博, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi, 戸田敬 and 米持真一 : 大気中陰イオン界面活性物質の動態と起源推定(9), 第60回大気環境学会年会, Sep. 2019.
97.	Ayumi Tabata, Tomoyo Taniguchi, Masaki Takeuchi and Hideji TANAKA : 液滴を用いた吸光光度検出法の開発, 第25回分析化学若手セミナー, Jun. 2019.
98.	Tomoyo Taniguchi, Ayumi Tabata, Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : 液滴を用いたRGB画像検出法の開発, 第25回分析化学若手セミナー, Jun. 2019.
99.	Hitoshi Mizuguchi, Daichi Nishimori, Tomohiko Kuwabara, Masaki Takeuchi, 飯山真充 and Toshio Takayanagi : トラックエッチ膜フィルター電極を搭載した低容積フロー電解セルを用いるHPLC-電気化学検出, 第26回クロマトグラフィーシンポジウム, Jun. 2019.
100.	矢田崇将, 大河内博, 宮内洋輔, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, 和田龍一, Masaki Takeuchi, 戸田敬, 米持真一, 土器屋由紀子 and 畠山史郎 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの観測(4):富士山南東麓における長期トレンド, 第28回環境化学討論会, Jun. 2019.
101.	Mitsuo Dairiki, Hiroshi Okochi, Megumi Nakamura, Naoya Katsumi, Yukiya Minami, Shinichi Yonemochi, Kazuhiko Miura, Shungo Kato, Ryuichi Wada, Masaki Takeuchi, Kei Toda, Yukiko Dokiya and Shiro Hatakeyama : Observation of Cloud Water Chemistry in the Free Troposphere and the Atmospheric Boundary Layer on Mt. Fuji, 第28回環境化学討論会, Jun. 2019.
102.	Masaki Takeuchi, Haruka Yoshikawa, Yui Shimada, Naoyuki Miki, Kiichi Ishimine and Hideji TANAKA : ナフィオンチューブを用いた陰イオンのオンライン濃縮, 第26回クロマトグラフィーシンポジウム, Jun. 2019.
103.	Tomohiko Kuwabara, Daichi Nishimori, 飯山真充, Masaki Takeuchi, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を用いるHPLC多電位検出システムにおけるポリフェノール類の検出挙動, 第79回分析化学討論会, May 2019.
104.	Hideji TANAKA, Riona Wada, Masatoshi Yanase and Masaki Takeuchi : 試薬消費量の節減を可能にする三角波制御フロー分析法の開発, 第79回分析化学討論会, May 2019.
105.	Yuta Otsuka, Masaki Takeuchi and Hideji TANAKA : 超モバイル近赤外分光計によるカルバマゼピン擬似結晶多形転移の研究, 日本薬剤学会第34年会, May 2019.
106.	Masaki Takeuchi, Haruka Yoshikawa, Yui Shimada and Hideji TANAKA : ナフィオンチューブによる河川水中過塩素酸イオンのオンライン濃縮, 第79回分析化学討論会, May 2019.
107.	Yuta Otsuka, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 湿式メカノケミカル合成法によるクロロアパタイトの研究, バイオインテグレーション学会第9回学術大会, Apr. 2019.
108.	Sawako Oka, Junya Ochiai, Kazumasa Okamoto, Masaki Takeuchi and Hideji TANAKA : 気節-非相分離フィードバック制御フローレイショメトリーの開発と応用, 第55回フローインジェクション分析講演会, Nov. 2018.
109.	Takuya Sumitomo, Kazumasa Okamoto, Masaki Takeuchi and Hideji TANAKA : Visual Basicによる自動連続分析ソフトウェアの開発, 第55回フローインジェクション分析講演会, Nov. 2018.
110.	Kazumasa Okamoto, Hideji TANAKA and Masaki Takeuchi : 軸方向分散を抑えた陽イオン交換モジュールの開発とイオンクロマトグラフィーへの適用, 第55回フローインジェクション分析講演会, Nov. 2018.
111.	Makoto Namikawa, Kazumasa Okamoto, Tatsuya Oda, 大河内博, 戸田敬, Hideji TANAKA and Masaki Takeuchi : 自由対流圏高度における水溶性酸性ガス及び粒子状物質の連続分析, 第55回フローインジェクション分析講演会, Nov. 2018.
112.	Miharu Nomura, Hideji TANAKA and Masaki Takeuchi : 標準添加法を取り入れた海水中亜硝酸イオンのフロー分析, 第55回フローインジェクション分析講演会, Nov. 2018.
113.	Haruka Yoshikawa, Kazumasa Okamoto, Yui Shimada, Hideji TANAKA and Masaki Takeuchi : ナフィオンチューブによる前濃縮を用いた環境試料中過塩素酸イオンの高感度検出, 第55回フローインジェクション分析講演会, Nov. 2018.
114.	Daichi Nishimori, Masaki Takeuchi, Masamitsu Iiyama, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を用いるHPLC-電気化学検出によるカテコールアミンの分離検出, 第55回フローインジェクション分析講演会, Nov. 2018.
115.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : フィードバック制御フローレイショメトリーによるプロセス分析と制御, 日本分析化学会第67年会, Sep. 2018.
116.	Hideji TANAKA, Riona Wada, Masatoshi Yanase, 樋口慶郎 and Masaki Takeuchi : 振幅変調多重化フロー分析法と高濃度試料の非希釈分析, 日本分析化学会第67年会, Sep. 2018.
117.	村上周平, 大河内博, 廣川諒祐, 島田幸治郎, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi, 戸田敬 and 米持真一 : 大気中陰イオン界面活性物質の動態と起源推定(6), 第59回大気環境学会年会, Sep. 2018.
118.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : フィードバック制御フローレイショメトリーの工程管理への応用, 第24回中国四国支部分析化学若手セミナー, Jul. 2018.
119.	Naoki Oka, Masaki Takeuchi, Hideji TANAKA and Tatsusada Yoshida : 分子科学計算によるFK506結合タンパク質とリガンドとの分子間相互作用解析, 第24回中国四国支部分析化学若手セミナー, Jul. 2018.
120.	Yuta Otsuka, Satoru GOTO, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 徐放性製剤開発を目的としたアミノ酸によるハイドロキシアパタイトの結晶成長制御の研究, 日本薬剤学会第33年会, Jun. 2018.
121.	Kazumasa Okamoto, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフィーにおけるNafionチューブを用いたサプレッサーの開発, 第24回中国四国支部分析化学若手セミナー, Jun. 2018.
122.	Hideji TANAKA, Riona Wada and Masaki Takeuchi : 高濃度試料の分析を目的とした三角波制御フロー分析法の開発とFe2+定量による検証, 第78回分析化学討論会, May 2018.
123.	Masaki Takeuchi, Yui Shimada, Haruka Yoshikawa, 石嶺希一, 三木直之 and Hideji TANAKA : ナフィオンチューブを用いる陰イオンのオンライン濃縮/除去デバイス, 第78回分析化学討論会, May 2018.
124.	Daichi Nishimori, Masaki Takeuchi, 飯山真充, Toshio Takayanagi and Hitoshi Mizuguchi : トラックエッチ膜フィルター電極を検出器とする高速液体クロマトグラフィーシステムの開発, 第78回分析化学討論会, May 2018.
125.	Masaki Takeuchi, Naoya Tomiyasu, Makoto Namikawa, Hideji TANAKA, 戸田敬 and 大河内博 : 富士山頂における大気中HNO3, SO2, NO3-及びSO42-の高時間分解観測, 第27回環境化学討論会, May 2018.
126.	大河内博, 山地達也, 岩崎真和, 光石夏澄, 戸田敬 and Masaki Takeuchi : 富士山における火山ガスの調査と早期検知遠隔計測システムの開発, 第27回環境化学討論会, May 2018.
127.	村上周平, 大河内博, 廣川諒祐, 島田幸治郎, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi, 戸田敬, 米持真一 and 榎本孝紀 : 大気中陰イオン界面活性物質の動態と起源推定(5), 第27回環境化学討論会, May 2018.
128.	Miharu Nomura, Hideji TANAKA and Masaki Takeuchi : 標準添加法を取り入れたフローインジェクション分析法によるリン酸イオンの定量, 日本薬学会138年会, Mar. 2018.
129.	Makoto Namikawa, Kaho Maeda, Hideji TANAKA and Masaki Takeuchi : 膜透過を利用する大気中アンモニアガスの測定, 日本薬学会138年会, Mar. 2018.
130.	Kazumasa Okamoto, Mayu Watanabe, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフ法におけるサプレッサーと濃縮器の統合 ∼サプレッサー部の構築∼, 日本薬学会138年会, Mar. 2018.
131.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi, 佐々木哲郎 and Hideji TANAKA : 低温状態におけるカフェイン-シュウ酸共結晶のt高分解能型テラヘルツ測定と密度汎関数理論を用いた振動モード解析の研究, 日本薬学会138年会, Mar. 2018.
132.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 粉末X線回折法と全反射減衰赤外分光法を用いたメカノケミカル合成クロロアパタイトの結晶性評価, 日本薬学会138年会, Mar. 2018.
133.	Masaki Takeuchi, Shinya Nakagawa, Kazuaki Miyata and Hideji TANAKA : パーミエーションチューブ法による硝酸標準ガスの発生, 第34回イオンクロマトグラフィー討論会, Dec. 2017.
134.	光石夏澄, 岩崎真和, 井上広太郎, 井本ゆりか, 平美咲, 大平慎一, Masaki Takeuchi, 大河内博 and 戸田敬 : Wet denuder/particle collectorによる富士山頂における揮発性カルボニル化合物の分析, 第54回フローインジェクション分析講演会, Dec. 2017.
135.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : フィードバック/固定三角波制御フローレイショメトリーの局方医薬品定量への応用, 第54回フローインジェクション分析講演会, Dec. 2017.
136.	Daichi Nishimori, Masaki Takeuchi, Toshio Takayanagi and Hitoshi Mizuguchi : HPLC電気化学検出におけるトラックエッチ膜フィルター電極の適用について, 第54回フローインジェクション分析講演会, Nov. 2017.
137.	Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : フィードバック/固定三角波制御フローレイショメトリーの開発と局方医薬品のハイスループット滴定への応用, 第56回日本薬学会・日本薬剤師会・日本病院薬剤師会中国四国支部学術大会, Oct. 2017.
138.	Tomoko Hirasaka, Sawako Oka, Masaki Takeuchi and Hideji TANAKA : 気節-非相分離フィードバック制御フローレイショメトリーの各種酸塩基滴定への応用, 日本分析化学会第66年会, Sep. 2017.
139.	Erina Tomiyama, Riona Wada, Masaki Takeuchi and Hideji TANAKA : 高濃度試料の分析を目的とする三角波制御フロー分析法の開発, 日本分析化学会第66年会, Sep. 2017.
140.	Yui Shimada, Hideji TANAKA and Masaki Takeuchi : ナフィオンチューブを用いる微量陰イオンのオンライン濃縮, 日本分析化学会第66年会, Sep. 2017.
141.	光石夏澄, 岩崎真和, 大平慎一, Masaki Takeuchi, 大河内博 and 戸田敬 : 富士山頂の湿性粒子や雲水に存在するカルボニル化合物, 日本分析化学会第66年会, Sep. 2017.
142.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 亜鉛クロロアパタイトのメカノケミカル合成と赤外吸収・粉末X線回折データの多変量解析に基づく結晶性評価, 第26回無機リン化学討論会, Aug. 2017.
143.	Riona Wada, 富山えりな, Masaki Takeuchi and Hideji TANAKA : 高濃度試料の分析を目的とした振幅変調フロー分析法の研究, 第23回中国四国支部分析化学若手セミナー, Jul. 2017.
144.	Aiko Miyazaki, Naoya Kakiuchi, Masaki Takeuchi and Hideji TANAKA : フィードバック制御と固定三角波制御を併用したフローレイショメトリーによるハイスループット滴定, 第23回中国四国支部分析化学若手セミナー, Jul. 2017.
145.	山脇拓実, 麻生智香, 大河内博, 島田幸治郎, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi, 戸田敬 and 米持真一 : 富士山体を観測タワーとして活用した自由対流圏大気および雲水中揮発性有機化合物の観測(2), 第26回環境化学討論会, Jun. 2017.
146.	宮内洋輔, 大河内博, 島田幸治郎, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi and 戸田敬 : 富士山体を利用した大気境界層上層および自由対流圏における酸性ガスおよびエアロゾルの観測(1), 第26回環境化学討論会, Jun. 2017.
147.	大河内博, 村上周平, 廣川諒祐, 島田幸治郎, 勝見尚也, 皆巳幸也, 小林拓, 三浦和彦, 加藤俊吾, Masaki Takeuchi, 戸田敬, 米持真一 and 榎本孝紀 : 自由対流圏大気エアロゾル中PFOS/PFOAの動態に関する予備検討:新規開発されたハイボリュームエアサンプラー用 PM2.5 サイクロンの富士山頂におけるフィールド観測への適用, 第26回環境化学討論会, Jun. 2017.
148.	Naoya Kakiuchi, Aiko Miyazaki, Masaki Takeuchi and Hideji TANAKA : ハイスループット滴定(43滴定/分)を可能にするフィードバック/固定三角波制御フローレイショメトリー, 第77回分析化学討論会, May 2017.
149.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 結晶性評価を目的とした赤外分光法と多変量解析の研究; 亜鉛クロロアパタイトへの応用, 日本薬学会137年会, Mar. 2017.
150.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi, 三留肇 and Hideji TANAKA : 粉末X線回折パターンの予測を目的としたラマン・赤外スペクトルデータの相関解析;テオフィリン結晶多形への応用, 日本薬学会137年会, Mar. 2017.
151.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 新規バイオセラミックとしての水酸基置換アパタイトの研究, 第5回日本バイオマテリアル学会中四国シンポジウム, Jan. 2017.
152.	Naoya Tomiyasu, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : 徳島市における水溶性酸性ガス及びPM2.5に含まれる陰イオンの高時間分解観測, 第33回イオンクロマトグラフィー討論会, Dec. 2016.
153.	Sawako Oka, Masaki Takeuchi and Hideji TANAKA : 気節-非相分離フローレイショメトリーによるハイスループット滴定, 第53回フローインジェクション分析講演会, Nov. 2016.
154.	Takuya Sumitomo, Mari Osaki, Masaki Takeuchi and Hideji TANAKA : 内標準‐振幅変調多重化フロー分析法の開発とFe2+定量による検証, 第53回フローインジェクション分析講演会, Nov. 2016.
155.	Kazumasa Okamoto, Mayu Watanabe, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフ法におけるサプレッサーと濃縮器の統合, 第53回フローインジェクション分析講演会, Nov. 2016.
156.	Miki Narita, Emako Takano, Hideji TANAKA and Masaki Takeuchi : 大気エアロゾルに含まれる過塩素酸イオンの動態解析, 第53回フローインジェクション分析講演会, Nov. 2016.
157.	Hiroki Watanabe, Yuta Ohtsuka, Hideji TANAKA and Masaki Takeuchi : クロマトグラムの多変量解析∼中空キャピラリーカラムを用いたカチオン分析∼, 第53回フローインジェクション分析講演会, Nov. 2016.
158.	Naoya Tomiyasu, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : 富士山頂における水溶性酸性ガス/粒子状物質の観測, 第53回フローインジェクション分析講演会, Nov. 2016.
159.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 全反射減衰赤外分光法と多変量解析を用いるテオフィリン錠剤の示差走査熱量と溶出挙動の予測, 日本分析化学会第65年会, Sep. 2016.
160.	Naoya Kakiuchi, Masaki Takeuchi, 藤川明洋 and Hideji TANAKA : フィードバック / 固定三角波制御フローレイショメトリーによる超ハイスループット滴定, 日本分析化学会第65年会, Sep. 2016.
161.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi, 三留肇 and Hideji TANAKA : ポータブルラマン分光計とケモメトリックスを用いる医薬品溶出挙動と粉末X線パターンの予測, 日本分析化学会第65年会, Sep. 2016.
162.	Saki Matsumura, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 全反射減衰-赤外分光法および主成分分析法を用いるテオフィリン無水物錠の溶媒介転移に関する研究, 日本分析化学会第65年会, Sep. 2016.
163.	Masaki Takeuchi, Shinya Nakagawa, Kazuaki Miyata, Hiroki Watanabe and Hideji TANAKA : 大気分析のための硝酸ガス発生装置の開発, 第57回大気環境学会年会, Sep. 2016.
164.	Akira Itoh, Saki Matsumura, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 紫外吸収スペクトルのフロー測定とケモメトリックスによる二層錠製剤の溶出挙動の評価, 第22回中国四国支部分析化学若手セミナー, Jul. 2016.
165.	Hideji TANAKA, Hiroya Kubo, Mari Osaki, Sawako Oka, Takuya Sumitomo and Masaki Takeuchi : フィードバック制御フローレイショメトリーと振幅変調多重化フロー分析法, 第76回分析化学討論会, May 2016.
166.	Masaki Takeuchi : イオンクロマトグラフ-ポストカラム濃縮法による微量陰イオンの高感度分析, 第76回分析化学討論会, May 2016.
167.	成田三紀, 高野恵万子, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフィーを用いた河川水中の過塩素酸イオン分析法の検討, 日本薬学会136年会, Mar. 2016.
168.	Naoya Takagi, Makoto Namikawa, Hideji TANAKA and Masaki Takeuchi : 徳島市内における酸性ガス/PM2.5のオンライン分析, 日本薬学会136年会, Mar. 2016.
169.	Saki Matsumura, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 高湿度条件下におけるテオフィリン無水物の溶媒介転移, 日本薬学会136年会, Mar. 2016.
170.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi, 三留肇 and Hideji TANAKA : 示差走査熱量曲線の予測を目的としたポータブルラマン分光計によるテオフィリン錠剤の測定, 日本薬学会136年会, Mar. 2016.
171.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : 新規バイオセラミックスとしてのクロロアパタイトのメカノケミカル合成とその評価, 日本薬学会136年会, Mar. 2016.
172.	Shinya Nakagawa, Hideji TANAKA and Masaki Takeuchi : 硝酸ガス発生装置, 第52 回フローインジェクション分析講演会, Nov. 2015.
173.	Mari Osaki, Takeshi Ohgusu, Masaki Takeuchi and Hideji TANAKA : 内標準法を導入した振幅変調多重化フロー分析法によるFe2+の定量, 第52 回フローインジェクション分析講演会, Nov. 2015.
174.	Hiroya Kubo, Erina Tomiyama, Tomoko Hirasaka, Masaki Takeuchi and Hideji TANAKA : 気節-非相分離フィードバック制御フローレイショメトリーによる滴定, 第52 回フローインジェクション分析講演会, Nov. 2015.
175.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : カフェイン-シュウ酸2:1共結晶のメカノケミカル合成における機械的エネルギーと温度の影響, 2015 Tokushima Bioscience Retreat, Sep. 2015.
176.	Hideji TANAKA, Tomoko Hirasaka, Erina Tomiyama and Masaki Takeuchi : フィードバック制御フローレイショメトリーに基づくフロー滴定法への気節法の導入, 日本分析化学会第64年会, Sep. 2015.
177.	Masaki Takeuchi, Shinya Nakagawa, Hiroki Watanabe, Yuki Miyazaki, Hideji TANAKA, 磯部貴陽, 緒方裕子 and 大河内博 : ウエットデニューダー法による水溶性酸性ガスの富士山頂定点観測, 第56回大気環境学会年会, Sep. 2015.
178.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : カフェイン-シュウ酸2:1共結晶のメカノケミカル合成における機械的エネルギーと温度の影響, 第21回分析化学若手セミナー, Jul. 2015.
179.	Yuta Ohtsuka, Saki Matsumura, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 医薬品結晶転移制御を目的とした赤外スペクトルと多変量解析に基づく研究, 第21回分析化学若手セミナー, Jul. 2015.
180.	Yuta Ohtsuka, Saki Matsumura, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 医薬品結晶転移制御を目的とした赤外スペクトルと多変量解析に基づく研究, 第3回若手研究者シーズ発表会ー計測と分析ー, Jul. 2015.
181.	Hiroya Kubo, Masaki Takeuchi and Hideji TANAKA : 全リン定量のための各種リン化合物のCo3+による前処理, 第75回分析化学討論会, May 2015.
182.	Mari Osaki, Takeshi Ohgusu, Masaki Takeuchi and Hideji TANAKA : 内標準法を導入した振幅変調多重化フロー分析法, 第75回分析化学討論会, May 2015.
183.	Masaki Takeuchi, Kiichi Ishimine, Naoyuki Miki, Yuki Miyazaki and Hideji TANAKA : イオンクロマトグラフィーに用いる炭酸イオン除去デバイス, 日本分析化学会第64年会, May 2015.
184.	戸田敬, 柚木悟, 彌永輝, 穂積成斗, Masaki Takeuchi and 大平慎一 : PM2.5中揮発性化学物質のニアリアルタイム分析:ホルムアルデヒドの気相/粒子間の移動をみる, 第75回分析化学討論会, May 2015.
185.	Hiroki Watanabe, Jun Sugiura, Hideji TANAKA and Masaki Takeuchi : 小型溶離液発生装置を用いる低圧イオンクロマトグラフィー, 第75回分析化学討論会, May 2015.
186.	Masaki Takeuchi, Miki Narita, Emako Takano, 吉岡薫 and Hideji TANAKA : 大気エアロゾルに含まれる過塩素酸イオンの分析, 第75回分析化学討論会, May 2015.
187.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 医薬品配合剤原末の赤外スペクトルと粉末X線回折による定量的相関解析, 日本薬学会135年会, Mar. 2015.
188.	Akira Itoh, Yuta Ohtsuka, Masaki Takeuchi and Hideji TANAKA : カフェイン‐シュウ酸2:1共結晶のメカノケミカル合成における機械的エネルギーと温度の影響, 日本薬学会135年会, Mar. 2015.
189.	Hideji TANAKA, Takeshi Ohgusu, Kohji Inui, Haruka Yoshida, Katsuya Uchimoto and Masaki Takeuchi : 気節-非相分離振幅変調多重化フロー分析法の開発と応用, 日本薬学会135年会, Mar. 2015.
190.	Masaki Takeuchi, Kiichi Ishimine, Naoyuki Miki, Yuki Miyazaki and Hideji TANAKA : ミネラル炭酸水に含まれる陰イオンの分析, 日本薬学会135年会, Mar. 2015.
191.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 粉末X線回折法とケモメトリックスに基づく医薬品原末中の多成分の同時定量, 日本分析化学会第63年会, Sep. 2014.
192.	Takeshi Ohgusu, Mari Osaki, Masaki Takeuchi and Hideji TANAKA : 振幅変調多重化フロー分析法; 内標準法の導入の検討, 日本分析化学会第63年会, Sep. 2014.
193.	Azumi Miyazaki, Masaki Takeuchi and Hideji TANAKA : 縮合リン酸の酸加水分解に対する金属イオンの影響, 日本分析化学会第63年会, Sep. 2014.
194.	Katsuya Uchimoto, Masaki Takeuchi and Hideji TANAKA : ミセル濃縮を利用した振幅変調フロー分析法, 日本分析化学会第63年会, Sep. 2014.
195.	Naoyuki Miki, Kiichi Ishimine, Hideji TANAKA and Masaki Takeuchi : Nafion tubeを用いたポストカラム濃縮法による陰イオンの高感度定量, 日本分析化学会第63年会, Sep. 2014.
196.	Kiichi Ishimine, Naoyuki Miki, Yuki Miyazaki, Hideji TANAKA and Masaki Takeuchi : Nafion tubeを用いた炭酸イオン除去装置, 日本分析化学会第63年会, Sep. 2014.
197.	戸田敬, 柚木悟, 彌永輝, 穂積成斗, 大平慎一, Masaki Takeuchi and Dasgupta K. Purnendu : PM2.5に含まれるホルムアルデヒドの分析, 日本分析化学会第63年会, Sep. 2014.
198.	小川智司, 大河内博, 磯部貴陽, 緒方裕子, 名古屋俊士, 皆巳幸也, Masaki Takeuchi, 小林拓, 三浦和彦, 加藤俊吾, 植松光夫, 米持真一 and 梅沢夏実 : 富士山体を利用した自由対流圏大気中酸性ガスおよびエアロゾルの観測(5), 第55回大気環境学会年会, Sep. 2014.
199.	Miki Narita, Hideji TANAKA and Masaki Takeuchi : イオンクロマトグラフィーを用いた環境中の過塩素酸イオン分析法の検討, 第20回分析化学若手セミナー, Jul. 2014.
200.	Naoya Tomiyasu, Hideji TANAKA and Masaki Takeuchi : ウェットデニューダー/ミストチャンバー法による水溶性酸性ガス/PM2.5の連続分析, 第20回分析化学若手セミナー, Jul. 2014.
201.	Yuta Ohtsuka, Saki Matsumura, Masaki Takeuchi and Hideji TANAKA : ATR-IRスペクトルの多変量解析に基づくヒドロキシプロピルセルロース水溶液による結晶転移抑制の研究, 第74回分析化学討論会, May 2014.
202.	Emako Takano, Kaoru Yoshioka, Hideji TANAKA and Masaki Takeuchi : Determination of perchlorate in river water based on ion chromatograph coupled with post-column concentrator, 第51 回フローインジェクション分析講演会, Nov. 2013.
203.	Haruka Yoshida, Koji Inui, Masaki Takeuchi and Hideji TANAKA : Determination of nitrite and nitrate ions in water samples by air segmented - amplitude modulated multiplexed flow analysis, 第51 回フローインジェクション分析講演会, Nov. 2013.
204.	柚木悟, 彌永輝, Masaki Takeuchi, 大平慎一 and 戸田敬 : ウエットデニューダーとパーティクルコレクターによるエアロゾル中ホルムアルデヒドの検出, 第51 回フローインジェクション分析講演会, Nov. 2013.
205.	磯部貴陽, 大河内博, 緒方裕子, Masaki Takeuchi and 皆巳幸也 : 富士山体を利用した自由対流圏大気中酸性ガスおよびエアロゾルの観測(4), 第54回大気環境学会年会, Sep. 2013.
206.	Nakagawa Shinya, Hideji TANAKA and Masaki Takeuchi : Nitric acid gas generator, 第19回分析化学若手セミナー, Aug. 2013.
207.	Kubo Hiroya, Kuritani Kazunori, Hideji TANAKA and Masaki Takeuchi : Pritreatment of phosphorus compounds with Co3+ for total phosphorus determination, 第19回分析化学若手セミナー, Aug. 2013.
208.	Takano Emako, Yoshioka Kaoru, Hideji TANAKA and Masaki Takeuchi : Behavior of perchlorate in atomospheric aerosol at Tokushima city, 第19回分析化学若手セミナー, Aug. 2013.
209.	Kazunori Kuritani, Hiroya Kubo, Azumi Miyazaki, Masaki Takeuchi and Hideji TANAKA : 全リン定量を目的とする電解発生Co3+を用いる各種リン化合物の迅速前処理法の開発, 第73回分析化学討論会, May 2013.
210.	Emako Takano, 吉岡薫, Hideji TANAKA and Masaki Takeuchi : 大気エアロゾル中粗大粒子および微小粒子に含まれる過塩素酸イオンの動態, 第73回分析化学討論会, May 2013.
211.	Takeshi Ohgusu, Katsuya Uchimoto, Masaki Takeuchi and Hideji TANAKA : 気節-振幅変調多重化フロー分析法によるリン酸イオンの定量, 第17回徳島地区分析技術セミナー, Dec. 2012.
212.	Yuki Miyazaki, 磯部貴陽, 大河内博, 緒方裕子, Hideji TANAKA and Masaki Takeuchi : 富士山南東麓における大気中酸性ガスの連続観測, 第50 回フローインジェクション分析講演会, Nov. 2012.
213.	Azumi Miyazaki, Kazunori Kuritani, Masaki Takeuchi and Hideji TANAKA : 全リン定量のためのCo3+前処理法の開発とFIA による評価, 第50 回フローインジェクション分析講演会, Nov. 2012.
214.	柚木悟, 大平慎一, Masaki Takeuchi and 戸田敬 : エアロゾル中ホルムアルデヒドの検出の試み, 第50 回フローインジェクション分析講演会, Nov. 2012.
215.	Yuki Miyazaki, Hideji TANAKA and Masaki Takeuchi : 炭酸除去デバイスの開発, 日本分析化学会第61年会, Sep. 2012.
216.	Jun Sugiura, Hideji TANAKA and Masaki Takeuchi : 中空キャピラリーカラムを用いた低圧イオンクロマトグラフィーの開発, 日本分析化学会第61年会, Sep. 2012.
217.	Takeshi Ohgusu, Katsuya Uchimoto, Masaki Takeuchi and Hideji TANAKA : リン酸イオンの定量を目的とする気節‐非相分離/振幅変調多重化フロー分析法, 日本分析化学会第61年会, Sep. 2012.
218.	Kohji Inui, Haruka Yoshida, Masaki Takeuchi and Hideji TANAKA : 気節‐非相分離/振幅変調多重化フロー分析法によるアンモニウムイオンの定量, 日本分析化学会第61年会, Sep. 2012.
219.	Masaki Takeuchi, Yuki Miyazaki and Hideji TANAKA : 徳島市における大気中酸性ガスの特徴, 第53回大気環境学会年会, Sep. 2012.
220.	戸田敬, 柚木悟, 大平慎一 and Masaki Takeuchi : 大気中エアロゾルにホルムアルデヒドは存在するか?, 日本分析化学会第61年会, Sep. 2012.
221.	Masaki Takeuchi, Yuki Miyazaki, 角田浩道 and Hideji TANAKA : 徳島市における大気中酸性ガスの高時間分解観測, 第72回分析化学討論会, May 2012.
222.	Hideji TANAKA, Kurokawa Yohei, Inui Koji, Yoshida Haruka and Masaki Takeuchi : Simultaneous Determination of Multiple Analytes by Amplitude Modulated Multiplexed Flow Analysis, 第49回フローインジェクション分析講演会, Dec. 2011.
223.	Masato Izumi, 渡辺瑞紀, 小畑智章, 戸田敬, Hideji TANAKA and Masaki Takeuchi : アニュラーデニューダーを用いた硫化水素ガス分析装置の開発, 第49回フローインジェクション分析講演会, Dec. 2011.
224.	Yuki Miyazaki, Hiromichi Tsunoda, Hideji TANAKA and Masaki Takeuchi : Development of Nafion membrane tube based carbonate removal device, 第49回フローインジェクション分析講演会, Dec. 2011.
225.	Ogusu Takeshi, Inui Koji, Masaki Takeuchi and Hideji TANAKA : Air Segmented - Amplitude Modulated Multiplexed Flow Analysis without Deaeration, 第49回フローインジェクション分析講演会, Dec. 2011.
226.	Masaki Takeuchi, Emako Takano, 吉岡薫 and Hideji TANAKA : 大気エアロゾルに含まれる過塩素酸イオンの連続測定, 第52回大気環境学会年会, Sep. 2011.
227.	Takeshi Ohgusu, Masaki Takeuchi and Hideji TANAKA : 気節-非相分離/振幅変調フロー分析法による高感度定量, 日本分析化学会第60年会, Sep. 2011.
228.	Masaki Takeuchi : ナフィオンチューブによる陰イオンのオンライン濃縮, 第15回徳島地区分析技術セミナー, Feb. 2011.
229.	Yohei Kurokawa, Masaki Takeuchi and Hideji TANAKA : Amplitude modulated multiplexed flow analysis for simultaneous determination of chloride ions, The Secod Decennial Meeting Between The University of Tokuhsima and Soul National University on Pharmaceutical Sciences, Dec. 2010.
230.	Masaki Takeuchi, Kiichi Ishimine, Yusuke Toyama and Hideji TANAKA : ナフィオンチューブによる前濃縮, 2010年日本化学会西日本大会, Nov. 2010.
231.	上村剛史, Takeshi Ohgusu, Masaki Takeuchi and Hideji TANAKA : 振幅変調フロー分析法による微量リン酸イオンの定量, 第20回無機リン化学討論会, Oct. 2010.
232.	角田浩道, Hideji TANAKA and Masaki Takeuchi : ウエットデニューダーによるガス成分の捕集 -フィルター法，インピンジャー法，拡散スクラバー法との比較-, 日本分析化学会第59年会, Sep. 2010.
233.	吉岡薫, Yusuke Toyama, 加々美愛, Hideji TANAKA and Masaki Takeuchi : 大気エアロゾル中過塩素酸イオンの連続分析, 日本分析化学会第59年会, Sep. 2010.
234.	黒河洋平, Masaki Takeuchi, Akira Ohbuchi and Hideji TANAKA : 振幅変調多重化フロー分析法の原理と応用. 塩化物イオン, 鉄イオンの定量, 日本分析化学会第59年会, Sep. 2010.
235.	Masaki Takeuchi, 角田浩道, Hideji TANAKA, 田中傑 and 白水好美 : ウエットデニューダー/イオンクロマトグラフィーによる大気中酸性ガス成分の連続測定, 第51回大気環境学会年会, Sep. 2010.
236.	Hideji TANAKA, Kohji Inui and Masaki Takeuchi : 気節導入による振幅変調フロー分析法の高感度化, 第71回分析化学討論会, May 2010.
237.	角田浩道, 田中傑, 白水好美, Hideji TANAKA and Masaki Takeuchi : クリーンルームにおける酸性ガスの自動モニタリング, 第71回分析化学討論会, May 2010.
238.	Masaki Takeuchi : ナフィオンチューブによる陰イオンのオンライン濃縮, 第15回徳島地区分析技術セミナー, Feb. 2010.
239.	白水好美, 田中傑, 並木則和, Masaki Takeuchi, Hideji TANAKA and 藤井修二 : ウエットデニューダ方式のアミンアンモニア自動モニタ, プレISCC2010空気清浄とコンタミネーションコントロール研究発表会, 2010.
240.	Hideji TANAKA, 上村剛司, Takeshi Ohgusu and Masaki Takeuchi : 振幅変調/ロックイン検出フロー分析法によるリン酸イオンの定量, 第48回フローインジェクション分析講演会, Nov. 2009.
241.	Tursunjan Aydan, Masaki Takeuchi and Hideji TANAKA : Spectrophotometric Determination of Anionic Surfactant Based on Ion-pair Formation with Methylene Blue in Reversed Flow Injection Mode., 第48回フローインジェクション分析講演会, Nov. 2009.
242.	上村剛司, Takeshi Ohgusu, Masaki Takeuchi and Hideji TANAKA : 振幅変調フロー分析法/マラカイトグリーン法による微量リン酸イオンの定量, 第19回無機リン化学討論会, Oct. 2009.
243.	吉岡薫, 外山祐介, 加々美愛, Hideji TANAKA and Masaki Takeuchi : エアロゾル中過塩素酸イオンのポストカラム濃縮, 日本分析化学会第58年会, Sep. 2009.
244.	Takuto Mima, Hirokazu Takayasu, Masaki Takeuchi and Hideji TANAKA : 振幅変調多重化フロー分析法によるFe(II)及びFe(III)の同時定量, 日本分析化学会第58年会, Sep. 2009.
245.	黒河洋平, Masaki Takeuchi and Hideji TANAKA : 振幅変調多重化フロー分析法の測定効率向上のための検討, 日本分析化学会第58年会, Sep. 2009.
246.	Masaki Takeuchi : ウエットデニューダー方式の酸性ガス自動モニタ, 半導体ロードマップ委員会ワーキンググループ11技術委員会ヒアリング, May 2009.
247.	Masaki Takeuchi, Qingyang Li, Bingcheng Yang, Purnendu K. Dasgupta, Hideji TANAKA and Vincent E. Wilde : 容量デジタルコンバータによる非接触型電気伝導度検出, 第70回分析化学討論会, May 2009.
248.	戸田敬, 小畑智明, 廣田和敏, Vladimir Obolkin, Vladimir Potemkin, Tamara Kozher and Masaki Takeuchi : 大気中硫黄化合物のフィールド分析: バイカル湖岸パルプ工場の大気環境への影響評価, 第70回分析化学討論会, May 2009.
249.	Masaki Takeuchi, 角田浩道, Hideji TANAKA, 田中傑 and 白水好美 : ウエットデニューダー方式の酸性ガス自動モニタ, 第27回空気清浄とコンタミネーションコントロール研究大会, Apr. 2009.
250.	Hideji TANAKA, 上村剛史, Takeshi Ohgusu and Masaki Takeuchi : 水中の微量リンの定量を目的とした振幅変調フロー分析法の研究, 日本薬学会第139年会, Mar. 2009.
251.	Masaki Takeuchi, Rahmat SM Ullah, Purnendu K Dasagupta, Hideji TANAKA and Allen Williams : ウエット親水性フィルターによる大気中エアロゾル成分の連続測定, 第49回大気環境学会, Sep. 2008. (Keyword) エアロゾル
252.	Masaki Takeuchi, Jianzhong Li, Kavin J Morris, Hideji TANAKA and Purnendu K Dasgupta : 親水性膜デニューダーによる大気中ガス成分の連続測定, 第49回大気環境学会, Sep. 2008. (Keyword) デニューダー / ガス
253.	Hideji TANAKA, 黒河洋平, 上村剛史, Takuto Mima and Masaki Takeuchi : 振幅変調多重化フロー分析法の効率向上のための最適化, 日本分析化学会第57年会, Sep. 2008. (Keyword) フロー分析
254.	Masaki Takeuchi, Bingcheng Yang, Hideji TANAKA and Purnendu K Dasgupta : 低圧キャピラリーイオンクロマトグラフィー用ガスフリー溶離液発生器, 日本分析化学会第57年会, Sep. 2008. (Keyword) イオンクロマトグラフィー / 溶離液発生器
255.	Hideji TANAKA, Takuto Mima, Hitoshi Iida and Masaki Takeuchi : 多重制御流量比法のFe(II)およびFe(III)同時定量への応用, 第69回分析化学討論会, May 2008. (Keyword) フロー分析
256.	Masaki Takeuchi, Purnendu K Dasagupta, Jason V Dyke and Kannan Srinivasan : ポストカラム濃縮器, 第69回分析化学討論会, May 2008. (Keyword) ポストカラム / 濃縮器
257.	Masaki Takeuchi, 前田敏哉, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(13), 第43回大気環境学会年会, Sep. 2002.
258.	Masaki Takeuchi, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(12), 第43回大気環境学会年会, Sep. 2002.
259.	Masaki Takeuchi, 長谷川哲夫, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(11), 第42回大気環境学会年会, Oct. 2001.
260.	Masaki Takeuchi, 長谷川哲夫, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(10), 第41回大気環境学会年会, Sep. 2000.
261.	Masaki Takeuchi, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(9), 日本化学会第78春季年会, Mar. 2000.
262.	Masaki Takeuchi, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(8), 第40回大気環境学会年会, Sep. 1999.
263.	Masaki Takeuchi, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(7), 第39回大気環境学会年会, Sep. 1998.
264.	Masaki Takeuchi, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(6), 日本化学会第74春季年会, Mar. 1998.
265.	Masaki Takeuchi, 大田垣恵, 大河内博 and 井川学 : 露水の化学組成とその酸性化機構(5), 環境科学会1997年会, Oct. 1997.
266.	井川学, Masaki Takeuchi, 片桐保行, 谷川潤一郎 and 大河内博 : 雨，霧，露水中に含まれる有機酸濃度とその支配要因, 第37回大気環境学会年会, Sep. 1996.

Et cetera, Workshop:

1.	Masaki Takeuchi : 大気中酸性ガス及びエアロゾル成分のオンサイト分析, 日本鉄鋼協会評価分析解析部会フォーラム研究会, Dec. 2018.
2.	Ken Kamiyotsumoto, Masaki Takeuchi, Yoko Uwate and Yoshifumi Nishio : Performance of Ant Colony Optimization Changing Characteristics of Pheromone's Reaction, International Workshop on Computer Vision and Signal Processing (CVSP'18), Apr. 2018.
3.	Yuta Ohtsuka, Akira Itoh, Masaki Takeuchi and Hideji TANAKA : 医薬品結晶多形におけるビッグデータ回帰予測, 課題提案型ワークショップ「ビッグデータの利活用について考える」, Jun. 2016.
4.	Kurokawa Yohei, Masaki Takeuchi and Hideji TANAKA : Amplitude modulated multiplexed flow analysis for simultaneous determination of chloride ions, The Secod Decennial Meeting Between The University of Tokuhsima and Soul National University on Pharmaceutical Sciences, Dec. 2010.

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)

Development of Video Imaging Based Colorimetry Using Digital Microscope and Its Application to Flow Analysis (Project/Area Number: 21K05127 )
Development of triangular-wave controlled amplitude-modulated flow analysis and its application to high concentration sample analysis with no dilution. (Project/Area Number: 18K05173 )
Development of PM2.5 monitoring system in free troposphere (Project/Area Number: 17KK0011 )
High time-resolution monitoring of transboundary air pollutants at the summit of Mt. Fuji (Project/Area Number: 17K00521 )
Air segmented - feedback based flow ratiometry for super high throughput titration (Project/Area Number: 15K07889 )
Observation of transboundary acid pollutants at the summit of Mt. Fuji by parallel-plate wet denuder and mist-chamber based particle collector techniques (Project/Area Number: 26340006 )
Development and application of air segmented - amplitude modulated multiplexed flow analysis with no phase separation (Project/Area Number: 24550101 )
High-sensitive detection of perchlorate by post-column concentration (Project/Area Number: 23710009 )
Study on Amplitude Modulated Multiplexed Flow Analysis and Its Improvement to Analysis of Practicality (Project/Area Number: 21550083 )
Post column concentrator coupled automated analysis system for perchlorate in atmospheric aerosol (Project/Area Number: 20850027 )
Search by Researcher Number (10457319)

Associate Professor : Takeuchi, Masaki

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Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)