キャピラリー電気泳動法による第四級アンモニウムイオンと一価有機酸イオンとのイオン会合反応の解析

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タイトル別名
  • New Developments in Capillary Electrophoresis. Application of Capillary Electrophoresis to Quantitative Analysis and Characterization. Analysis of ion-association reactions between quaternary ammonium ions and monovalent organic anions by capillary zone electrophoresis.
  • キャピラリー電気泳動法の新展開 キャピラリー電気泳動法の定量分析・キャラクタリゼーションへの応用 キャピラリー電気泳動法による第四級アンモニウムイオンと一価有機酸イオンとのイオン会合反応の解析
  • キャピラリー デンキ エイドウホウ ニヨル ダイ4キュウ アンモニウム イオ
  • キャピラリー電気泳動法による第四級アンモニウムイオンと一価有機酸イオンとのイオン会合反応の解析(「特集」キャピラリー電気泳動法の新展開)

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Ion-association reactions in an aqueous solution between monovalent aromatic anions and quaternary ammonium ions were analyzed by means of the electrophoretic mobility. The electrophoretic mobility of analytes, such as phenolate, benzoate, benzenesulfonate, 1, 3-benzenedisulfonate, 1- and 2- naphtholate, 1- and 2- naphthalenecarboxylate, and 1-and 2- naphthalenesulfonate, was obtained by capillary zone electrophoresis. The electrophoretic mobility of analyte anions decreased with increasing the concentrations of the quaternary ammonium ions added in migrating solutions. The change in the electrophoretic mobility was analyzed to obtain the ion-association constants (Kass) by a nonlinear least-squares analysis method, as well as linear-square analysis methods. The obtained ion-association constants were larger in the anions possessing naphthalene ring than in those possessing benzene ring. The values of Kass became larger when more bulky cations were used as a pairing ion, indicating that the hydrophobicity of ions contributed to the ion associability. The ion associablities of β-substituted naphthalene isomers were larger than those of the α-substituted type, which agreed with the acid-dissociation property of the anions. The difference in the Kass values among functional groups was small, compared with ion-pair extraction constant (Kex) of the ion associates.

収録刊行物

  • 分析化学

    分析化学 46 (6), 467-475, 1997

    公益社団法人 日本分析化学会

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