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{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307206","label":"url"}],"paper_title":{"en":"The improvement of water quality in an acidic river environment using waste concrete aggregates","ja":"The improvement of water quality in an acidic river environment using waste concrete aggregates"},"authors":{"en":[{"name":"SASAKI, Atsushi"},{"name":"YOSHIKAWA, Eishi"},{"name":"Mizuguchi Hitoshi"},{"name":"ENDO, Masatoshi"}],"ja":[{"name":"SASAKI, Atsushi"},{"name":"YOSHIKAWA, Eishi"},{"name":"水口 仁志"},{"name":"ENDO, Masatoshi"}]},"publication_date":"2013-06","publication_name":{"en":"Journal of Water and Environment Technology","ja":"Journal of Water and Environment Technology"},"volume":"Vol.11","number":"No.3","starting_page":"235","ending_page":"247","languages":["eng"],"referee":true,"identifiers":{"doi":["10.2965/jwet.2013.235"],"issn":["1348-2165"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/22817945","label":"url"},{"@id":"https://www.scopus.com/record/display.url?eid=2-s2.0-84864282647&origin=inward","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307201","label":"url"}],"paper_title":{"en":"A dual-electrode flow sensor fabricated using track-etched microporous membranes","ja":"A dual-electrode flow sensor fabricated using track-etched microporous membranes"},"authors":{"en":[{"name":"Mizuguchi Hitoshi"},{"name":"SHIBUYA, Kanako"},{"name":"FUSE, Azumi"},{"name":"HAMADA, Tomoko"},{"name":"IIYAMA, Masamitsu"},{"name":"TACHIBANA, Kazuhiro"},{"name":"NISHINA, Tatsuo"},{"name":"SHIDA, Junichi"}],"ja":[{"name":"水口 仁志"},{"name":"SHIBUYA, Kanako"},{"name":"FUSE, Azumi"},{"name":"HAMADA, Tomoko"},{"name":"IIYAMA, Masamitsu"},{"name":"TACHIBANA, Kazuhiro"},{"name":"NISHINA, Tatsuo"},{"name":"SHIDA, Junichi"}]},"description":{"en":"A new dual-electrode flow sensor has been fabricated by piling the microporous membrane electrodes which have 7-10μm thickness. The electrode was prepared by sputtering of platinum onto both sides of the membrane filter which contain a smooth flat surface as well as cylindrical pores with uniform diameters. The electrolysis is performed when the sample solution flows through the membrane electrode, and a generated analyte on the first working electrode is instantaneously transported to the surface of second working electrode which is located at the downstream of the first one. In this case, the sample solution surely flows through the pores of the membrane filters. As the result, highly efficient electrolysis was achieved at each electrode, and the collection efficiency values as high as 100% were obtained in the wide range of flow rate. Good responses to the injections of sample solutions were also confirmed in the FIA system.","ja":"A new dual-electrode flow sensor has been fabricated by piling the microporous membrane electrodes which have 7-10μm thickness. The electrode was prepared by sputtering of platinum onto both sides of the membrane filter which contain a smooth flat surface as well as cylindrical pores with uniform diameters. The electrolysis is performed when the sample solution flows through the membrane electrode, and a generated analyte on the first working electrode is instantaneously transported to the surface of second working electrode which is located at the downstream of the first one. In this case, the sample solution surely flows through the pores of the membrane filters. As the result, highly efficient electrolysis was achieved at each electrode, and the collection efficiency values as high as 100% were obtained in the wide range of flow rate. Good responses to the injections of sample solutions were also confirmed in the FIA system."},"publication_date":"2012-07","publication_name":{"en":"Talanta","ja":"Talanta"},"volume":"Vol.96","starting_page":"168","ending_page":"173","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1016/j.talanta.2012.02.001"],"issn":["1873-3573"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307198","label":"url"}],"paper_title":{"en":"Stripping Voltammetry with a Flow-through Electrochemical Cell for Simultaneous Trace Determination of Nickel(II) and Copper(II) in Concentrated Alkaline Solutions","ja":"フロー電解セルを用いるストリッピングボルタンメトリーによる高濃度アルカリ水溶液中の銅(II)とニッケル(II)の同時微量定量"},"authors":{"en":[{"name":"久松 亨"},{"name":"Mizuguchi Hitoshi"},{"name":"飯山 真充"},{"name":"柴田 信勝"}],"ja":[{"name":"久松 亨"},{"name":"水口 仁志"},{"name":"飯山 真充"},{"name":"柴田 信勝"}]},"publication_date":"2011-08","publication_name":{"en":"Bunseki Kagaku","ja":"分析化学"},"volume":"Vol.60","number":"No.8","starting_page":"665","ending_page":"670","languages":["jpn"],"referee":true,"identifiers":{"doi":["10.2116/bunsekikagaku.60.665"],"issn":["0525-1931"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"http://ci.nii.ac.jp/naid/10028107078/","label":"url"},{"@id":"https://cir.nii.ac.jp/crid/1390001204355452672/","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307195","label":"url"}],"paper_title":{"en":"Highly Sensitive Visual Colorimetry for Chromium (VI) by Ion-Pair Solid-Phase Extraction on a PTFE-Type Membrane Filter","ja":"PTFE製メンブランフィルターへのイオン対固相抽出によるクロム(VI)の高感度目視定量"},"authors":{"en":[{"name":"渡部 貴裕"},{"name":"Mizuguchi Hitoshi"},{"name":"志田 惇一"}],"ja":[{"name":"渡部 貴裕"},{"name":"水口 仁志"},{"name":"志田 惇一"}]},"description":{"en":"A simple and highly sensitive visual determination method for Cr(VI) based on ion-pair solid-phase extraction to a PTFE-type membrane filter has been developed. A colored complex that was formed through a reaction between Cr(VI) and diphenylcarbazide was adsorbed quantitatively under the coexistence of sodium dodecyl sulfate (SDS). The colored filter was sandwiched in between two slide glasses after putting a drop of water in order to prevent discoloration, which was caused by drying the colored filter. The concentration of Cr(VI) was determined through a visual comparison with the color standard. The visual detection limit was 0.3 μg dm-3. The calibration curve, assessed with the reflection spectrometric response (540 nm), was linear in the concentration range 0∼4 μg dm-3 (r = 0.998). The detection limit, defined as three-times the standard deviation of the reagent blank, was 0.07 μg dm-3 in 100 cm3 of the sample solution. The relative standard deviation (RSD) for 0.3 μg dm-3 Cr(VI) was 6.0% (n = 5). The proposed method was applied to the determination of Cr(VI) extracted from metallic parts.","ja":"PTFE製のメンブランフィルターを用いた固相抽出によるクロム(VI)の高感度目視定量法を開発した.硫酸酸性下におけるクロム(VI)とジフェニルカルバジドとの反応によって生成した有色の錯体は,ドデシル硫酸ナトリウム共存下での減圧ろ過によりメンブランフィルターに定量的に吸着した.本研究では,純水を滴下して2枚のスライドガラスに挟むことで少なくとも30分間はフィルターの着色が安定することを見いだし,色の濃淡によって微量のクロム(VI)を目視で定量できることがわかった.ろ過体積が100 cm3の場合での目視検出限界は0.3 μg dm-3であった.また,反射吸収測定では0∼4 μg dm-3の範囲で直線の検量線が得られた(r=0.998).検出限界は0.07 μg dm-3であり,0.3 μg dm-3のときの相対標準偏差は6.0%(n=5)であった.本法を実試料へ応用したところ,電熱原子吸光光度法(ET-AAS)による全クロム濃度の測定結果と一致した."},"publication_date":"2011-04-05","publication_name":{"en":"Bunseki Kagaku","ja":"分析化学"},"volume":"Vol.60","number":"No.4","starting_page":"339","ending_page":"344","languages":["jpn"],"referee":true,"identifiers":{"doi":["10.2116/bunsekikagaku.60.339"],"issn":["0525-1931"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/21233566","label":"url"},{"@id":"https://www.scopus.com/record/display.url?eid=2-s2.0-78651259528&origin=inward","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307193","label":"url"}],"paper_title":{"en":"Ultra-Trace Determination of Lead(II) in Water Using Electrothermal Atomic Absorption Spectrometry after Preconcentration by Solid-Phase Extraction to a Small Piece of Cellulose Acetate Type Membrane Filter","ja":"Ultra-Trace Determination of Lead(II) in Water Using Electrothermal Atomic Absorption Spectrometry after Preconcentration by Solid-Phase Extraction to a Small Piece of Cellulose Acetate Type Membrane Filter"},"authors":{"en":[{"name":"Mizuguchi Hitoshi"},{"name":"ISHIDA, Mirai"},{"name":"TAKAHASHI, Tomohiro"},{"name":"SASAKI, Atsushi"},{"name":"SHIDA, Junichi"}],"ja":[{"name":"水口 仁志"},{"name":"ISHIDA, Mirai"},{"name":"TAKAHASHI, Tomohiro"},{"name":"SASAKI, Atsushi"},{"name":"SHIDA, Junichi"}]},"description":{"en":"A simple and inexpensive preconcentration technique has been developed for the ultra-trace determination of lead(II) using electrothermal atomic absorption spectrometry (ETAAS). The lead(II) complex with dicyclohexano-18-crown 6-ether (DC18C6) was extracted to a small piece of cellulose acetate-type membrane filter (2 × 5 mm) merely by vigorously eccentric stirring for 120 min under the coexistence of sodium dodecyl sulfate (SDS) at around pH 7. The extraction medium was inserted into a graphite cuvette for the determination of lead(II) by ETAAS. A linear relation was obtained for the range of 0.1-5.0 ng in 10 ml of lead(II) standard solution (r = 0.998). The detection limit was found to be 0.03 ng of lead(II) in 10 ml (0.003 µg l(-1)) of water sample. The proposed method was applied to the ultra-trace determination of lead(II) in river water, underground water, tap water, and snow fall samples.","ja":"A simple and inexpensive preconcentration technique has been developed for the ultra-trace determination of lead(II) using electrothermal atomic absorption spectrometry (ETAAS). The lead(II) complex with dicyclohexano-18-crown 6-ether (DC18C6) was extracted to a small piece of cellulose acetate-type membrane filter (2 × 5 mm) merely by vigorously eccentric stirring for 120 min under the coexistence of sodium dodecyl sulfate (SDS) at around pH 7. The extraction medium was inserted into a graphite cuvette for the determination of lead(II) by ETAAS. A linear relation was obtained for the range of 0.1-5.0 ng in 10 ml of lead(II) standard solution (r = 0.998). The detection limit was found to be 0.03 ng of lead(II) in 10 ml (0.003 µg l(-1)) of water sample. The proposed method was applied to the ultra-trace determination of lead(II) in river water, underground water, tap water, and snow fall samples."},"publication_date":"2011-02","publication_name":{"en":"Analytical Sciences","ja":"Analytical Sciences"},"volume":"Vol.27","number":"No.1","starting_page":"85","ending_page":"89","languages":["eng"],"referee":true,"identifiers":{"doi":["10.2116/analsci.27.85"],"issn":["1348-2246"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"http://ci.nii.ac.jp/naid/10025980126/","label":"url"},{"@id":"https://cir.nii.ac.jp/crid/1390001204355444736/","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307190","label":"url"}],"paper_title":{"en":"Visual Determination of Trace Zinc(II) by Reverse Phased TLC with Tetrakis(4-carboxyphenyl)porphine","ja":"テトラキス(4-カルボキシフェニル)ポルフィンを用いる逆相薄層クロマトグラフィーによる亜鉛イオンの目視定量"},"authors":{"en":[{"name":"藤田 貴子"},{"name":"室月 祥枝"},{"name":"土屋 沙織"},{"name":"Mizuguchi Hitoshi"},{"name":"片桐 洋史"},{"name":"志田 惇一"}],"ja":[{"name":"藤田 貴子"},{"name":"室月 祥枝"},{"name":"土屋 沙織"},{"name":"水口 仁志"},{"name":"片桐 洋史"},{"name":"志田 惇一"}]},"description":{"en":"A new visual colorimetric and fluorimetric determination of trace zinc(II) has been developed by thin-layer chromatography (TLC) with tetrakis(4-carboxyphenyl)porphine (TCPP). In this method, the spots that are dependent on each metal ion concentration of zinc(II), copper(II), cadmium(II), and mercury(II) appear selectively on an octadecylsilanized (ODS) silica thin layer by chromatographic separation with 90% (w/w) methanol. The yellow-colored zinc(II)-TCPP complex is distinguished visually from the other species with different colors. The zinc(II) concentration is determined by a visual comparison of the yellow-colored spot. The visual detection limit is 3 × 10-6 mol dm-3, defined as the minimum concentration that is visually distinguishable against a reagent blank. The calibration curve assessed with the densitometric responses is linear in the concentration range 0∼5 × 10-6 mol dm-3. The detection limit, which is calculated with 3 ς at the reagent blank, is 3 × 10-7 mol dm-3. On the other hand, the fluorimetric detection of the zinc(II)-TCPP complex is also available under the irradiation of UV light in the dark, and the visual detection limits is 8 × 10-7 mol dm-3. The calibration curve in the fluorimetric mode is linear in the concentration range 0∼3 × 10-6 mol dm-3, and the limit of detection is 3 × 10-7 mol dm-3. The effect for the determination of zinc(II) is not found in the presence of magnesium(II), aluminum(III), calcium(II), chromium(III), iron(III), nickel(II), and cadmium(II). The proposed method has been successfully applied to the determination of zinc(II) in river-water samples around an old mine.","ja":"A new visual colorimetric and fluorimetric determination of trace zinc(II) has been developed by thin-layer chromatography (TLC) with tetrakis(4-carboxyphenyl)porphine (TCPP). In this method, the spots that are dependent on each metal ion concentration of zinc(II), copper(II), cadmium(II), and mercury(II) appear selectively on an octadecylsilanized (ODS) silica thin layer by chromatographic separation with 90% (w/w) methanol. The yellow-colored zinc(II)-TCPP complex is distinguished visually from the other species with different colors. The zinc(II) concentration is determined by a visual comparison of the yellow-colored spot. The visual detection limit is 3 × 10-6 mol dm-3, defined as the minimum concentration that is visually distinguishable against a reagent blank. The calibration curve assessed with the densitometric responses is linear in the concentration range 0∼5 × 10-6 mol dm-3. The detection limit, which is calculated with 3 ς at the reagent blank, is 3 × 10-7 mol dm-3. On the other hand, the fluorimetric detection of the zinc(II)-TCPP complex is also available under the irradiation of UV light in the dark, and the visual detection limits is 8 × 10-7 mol dm-3. The calibration curve in the fluorimetric mode is linear in the concentration range 0∼3 × 10-6 mol dm-3, and the limit of detection is 3 × 10-7 mol dm-3. The effect for the determination of zinc(II) is not found in the presence of magnesium(II), aluminum(III), calcium(II), chromium(III), iron(III), nickel(II), and cadmium(II). The proposed method has been successfully applied to the determination of zinc(II) in river-water samples around an old mine."},"publication_date":"2009-08-05","publication_name":{"en":"Bunseki Kagaku","ja":"分析化学"},"volume":"Vol.58","number":"No.8","starting_page":"761","ending_page":"765","languages":["jpn"],"referee":true,"identifiers":{"doi":["10.2116/bunsekikagaku.58.761"],"issn":["0525-1931"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307186","label":"url"}],"paper_title":{"en":"Synthesis and spectral properties of polymethine-cyanine dyenitroxide radical hybrid compounds for use as fluorescence probes to monitor reducing species and radicals","ja":"Synthesis and spectral properties of polymethine-cyanine dyenitroxide radical hybrid compounds for use as fluorescence probes to monitor reducing species and radicals"},"authors":{"en":[{"name":"SATO, Shingo"},{"name":"TSUNODA, Minoru"},{"name":"SUZUKI, Minoru"},{"name":"KUTSUNA, Masahiro"},{"name":"TAKIDO-UCHI, Kiyomi"},{"name":"SHINDO, Mitsuru"},{"name":"Mizuguchi Hitoshi"},{"name":"OBARA, Heitoro"},{"name":"OHYA, Hiroaki"}],"ja":[{"name":"SATO, Shingo"},{"name":"TSUNODA, Minoru"},{"name":"SUZUKI, Minoru"},{"name":"KUTSUNA, Masahiro"},{"name":"TAKIDO-UCHI, Kiyomi"},{"name":"SHINDO, Mitsuru"},{"name":"水口 仁志"},{"name":"OBARA, Heitoro"},{"name":"OHYA, Hiroaki"}]},"publication_date":"2009-01","publication_name":{"en":"Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy","ja":"Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy"},"volume":"Vol.71","number":"No.5","starting_page":"2030","ending_page":"2039","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1016/j.saa.2008.07.045"],"issn":["1386-1425"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307182","label":"url"}],"paper_title":{"en":"On-site Determination of Trace Nickel in Liquid Samples for Semiconductor Manufacturing by Highly Sensitive Solid-phase Colorimetry with -Furil Dioxime","ja":"On-site Determination of Trace Nickel in Liquid Samples for Semiconductor Manufacturing by Highly Sensitive Solid-phase Colorimetry with -Furil Dioxime"},"authors":{"en":[{"name":"Mizuguchi Hitoshi"},{"name":"ZHANG, Yan-Fan"},{"name":"ONODERA, Hirofumi"},{"name":"NISHIZAWA, Saori"},{"name":"SHIDA, Junichi"}],"ja":[{"name":"水口 仁志"},{"name":"ZHANG, Yan-Fan"},{"name":"ONODERA, Hirofumi"},{"name":"NISHIZAWA, Saori"},{"name":"SHIDA, Junichi"}]},"publication_date":"2008-07","publication_name":{"en":"Chemistry Letters","ja":"Chemistry Letters"},"volume":"Vol.37","number":"No.7","starting_page":"792","ending_page":"793","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1246/cl.2008.792"],"issn":["1348-0715"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"http://ci.nii.ac.jp/naid/110006656123/","label":"url"},{"@id":"https://cir.nii.ac.jp/crid/1390282679330515072/","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307181","label":"url"}],"paper_title":{"en":"Highly Selective Spot Test of Aluminum(III) at ppb Level by Reverse Phase TLC with Sample Drop Loading","ja":"液滴試料の逆相薄層クロマトグラフィーによるppbレベルのアルミニウムイオンの選択的スポットテスト"},"authors":{"en":[{"name":"工藤 祐生"},{"name":"高橋 直"},{"name":"額賀 恒次"},{"name":"Mizuguchi Hitoshi"},{"name":"遠藤 昌敏"},{"name":"志田 惇一"}],"ja":[{"name":"工藤 祐生"},{"name":"高橋 直"},{"name":"額賀 恒次"},{"name":"水口 仁志"},{"name":"遠藤 昌敏"},{"name":"志田 惇一"}]},"description":{"en":"A highly selective, sensitive, and practically useful spot test of aluminum(III) has been developed. In this method, a 5μL of ethanolqueous (1+1) sample solution containing metal chelates with 2,2'-dihydroxyazobenzene(DHAB) is loaded on a hydrophobic surface of an octadecylsilanized(ODS) silica plate, and thin-layer chromatography(TLC) is directly performed without drying the sample drop. The fluorescent aluminum(III) chelate remains selectively at the loading position, whereas the excess reagent, DHAB, and the chelates of the other metal ions are eluted. The fluorescent spot, which is observed only at the loading position, retains the circular shape of the initial interface between the sample drop and the plate. Immediately performing chromatographic separation after sample loading is effective for avoiding aluminum(III) contamination, which is caused by elution from the ODS-silica, because of the slow rate of formation of the aluminum (III)-DHAB complex. Furthermore, the matrix tolerance of the proposed method is superior to that of the previous method, in which chromatographic separation is performed after drying the sample drop. The visual detection limit is 1.0μg/L. The calibration curve assessed with the densitometric responses with an excitation beam(505nm) is linear over the concentration range up to 27 μg/L. The detection limit, which is calculated with 3.3ς. at a concentration of 1.4μg/L, is 0.2μpg/L(n=5). The proposed method has been applied to the determination of parts per billion levels of aluminum(III) ion in river-water samples.","ja":"A highly selective, sensitive, and practically useful spot test of aluminum(III) has been developed. In this method, a 5μL of ethanolqueous (1+1) sample solution containing metal chelates with 2,2'-dihydroxyazobenzene(DHAB) is loaded on a hydrophobic surface of an octadecylsilanized(ODS) silica plate, and thin-layer chromatography(TLC) is directly performed without drying the sample drop. The fluorescent aluminum(III) chelate remains selectively at the loading position, whereas the excess reagent, DHAB, and the chelates of the other metal ions are eluted. The fluorescent spot, which is observed only at the loading position, retains the circular shape of the initial interface between the sample drop and the plate. Immediately performing chromatographic separation after sample loading is effective for avoiding aluminum(III) contamination, which is caused by elution from the ODS-silica, because of the slow rate of formation of the aluminum (III)-DHAB complex. Furthermore, the matrix tolerance of the proposed method is superior to that of the previous method, in which chromatographic separation is performed after drying the sample drop. The visual detection limit is 1.0μg/L. The calibration curve assessed with the densitometric responses with an excitation beam(505nm) is linear over the concentration range up to 27 μg/L. The detection limit, which is calculated with 3.3ς. at a concentration of 1.4μg/L, is 0.2μpg/L(n=5). The proposed method has been applied to the determination of parts per billion levels of aluminum(III) ion in river-water samples."},"publication_date":"2008-04-05","publication_name":{"en":"Bunseki Kagaku","ja":"分析化学"},"volume":"Vol.57","number":"No.4","starting_page":"273","ending_page":"277","languages":["jpn"],"referee":true,"identifiers":{"doi":["10.2116/bunsekikagaku.57.273"],"issn":["0525-1931"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/18270412","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307179","label":"url"}],"paper_title":{"en":"Visual Colorimetry for Trace Antimony(V) by Ion-Pair Solid-Phase Extraction with Bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) on a PTFE Type Membrane Filter","ja":"Visual Colorimetry for Trace Antimony(V) by Ion-Pair Solid-Phase Extraction with Bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) on a PTFE Type Membrane Filter"},"authors":{"en":[{"name":"Mizuguchi Hitoshi"},{"name":"MATSUDA, Yuki"},{"name":"MORI, Takehito"},{"name":"UEHARA, Atsushi"},{"name":"ISHIKAWA, Yuta"},{"name":"ENDO, Masatoshi"},{"name":"SHIDA, Junichi"}],"ja":[{"name":"水口 仁志"},{"name":"MATSUDA, Yuki"},{"name":"MORI, Takehito"},{"name":"UEHARA, Atsushi"},{"name":"ISHIKAWA, Yuta"},{"name":"ENDO, Masatoshi"},{"name":"SHIDA, Junichi"}]},"description":{"en":"A new visual colorimetry for trace antimony(V) based on ion-pair solid-phase extraction to a PTFE-type membrane filter with bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) ion ([Co(5-Cl-PADAP)(2)](+)) has been developed. Experiments showed that hexachloroantimonate(V) ion (SbCl(6)(-)) was adsorbed with [Co(5-Cl-PADAP)(2)](+) to the front surface of the PTFE filter. The adsorption of antimony(V) ion was promoted by the addition of lithium chloride as a source of chloride ion. The excess reagent of [Co(5-Cl-PADAP)(2)](+) was eluted by rinsing with a 10 wt% methanol aqueous solution. In this case, the slow rate of the hydrolysis reaction of SbCl(6)(-) and the difference of the hydrophobicity of the ion pairs were important for adsorption and separation with a PTFE-type membrane filter. The antimony(V) concentration was determined through a visual comparison with a standard series. The visual detection limit was 0.10 microg. The calibration curve assessed with the reflection spectrometric responses at 580 nm was linear in the concentration range of 0.10 - 1.2 microg (r = 0.996). The proposed method has been applied to the determination of sub-microgram levels of antimony(V) ion in water samples.","ja":"A new visual colorimetry for trace antimony(V) based on ion-pair solid-phase extraction to a PTFE-type membrane filter with bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) ion ([Co(5-Cl-PADAP)(2)](+)) has been developed. Experiments showed that hexachloroantimonate(V) ion (SbCl(6)(-)) was adsorbed with [Co(5-Cl-PADAP)(2)](+) to the front surface of the PTFE filter. The adsorption of antimony(V) ion was promoted by the addition of lithium chloride as a source of chloride ion. The excess reagent of [Co(5-Cl-PADAP)(2)](+) was eluted by rinsing with a 10 wt% methanol aqueous solution. In this case, the slow rate of the hydrolysis reaction of SbCl(6)(-) and the difference of the hydrophobicity of the ion pairs were important for adsorption and separation with a PTFE-type membrane filter. The antimony(V) concentration was determined through a visual comparison with a standard series. The visual detection limit was 0.10 microg. The calibration curve assessed with the reflection spectrometric responses at 580 nm was linear in the concentration range of 0.10 - 1.2 microg (r = 0.996). The proposed method has been applied to the determination of sub-microgram levels of antimony(V) ion in water samples."},"publication_date":"2008-02","publication_name":{"en":"Analytical Sciences","ja":"Analytical Sciences"},"volume":"Vol.24","number":"No.2","starting_page":"219","ending_page":"223","languages":["eng"],"referee":true,"identifiers":{"doi":["10.2116/analsci.24.219"],"issn":["0910-6340"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"5000014240","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=307175","label":"url"}],"paper_title":{"en":"Visual Threshold Detection of Trace Metal Ions Using a Bi-Functional Metallochromic Reagent","ja":"Visual Threshold Detection of Trace Metal Ions Using a Bi-Functional Metallochromic Reagent"},"authors":{"en":[{"name":"Mizuguchi Hitoshi"},{"name":"YOTSUYANAGI, Takao"}],"ja":[{"name":"水口 仁志"},{"name":"YOTSUYANAGI, Takao"}]},"publication_date":"2001-12","publication_name":{"en":"Analytical Sciences","ja":"Analytical Sciences"},"volume":"Vol.17","starting_page":"i1687","ending_page":"i1689","languages":["eng"],"referee":true,"identifiers":{"doi":["10.14891/analscisp.17icas.0.i1687.0"],"issn":["0910-6340"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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