Capillary zone electrophoretic studies of ion association between inorganic anions and tetraalkylammonium ions in aqueous脙脙脙脙脙脙dioxane media

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• 作者：Mbuna ; Julius ; Takayanagi ; Toshio ; Oshima ; Mitsuko ; Motomizu ; Shoji
• 关键词：Aqueous脙脙脙脙脙脙dioxane media ; Williams脙脙脙脙脙脙Vigh method ; Ion association ; Capillary zone electrophoresis
• 刊名：Journal of Chromatography A
• 出版年：2005
• 期刊代码：47_00219673
• 类别：ch
• 出版时间：April 1, 2005
• 卷：1069
• 期：2
• 页码：261-270
• 文件大小：415 K

摘要

Ion association between inorganic anions and symmetrical tetraalkylammonium ions, R₄N⁺ (R = Me, Et, Pr, n-Bu, n-Am, and 2-methyl butyl {isoamyl = iAm}) was investigated using ordinary silica capillary by capillary zone electrophoresis. An improved version of the Williams–Vigh method was used for the first time to measure the mobilities of the inorganic anions. Plots of log K_ass against log dielectric constant in various media, revealed a smaller change in K_ass compared to dielectric constant. These plots suggest that the Bjerrum's equation is inadequate in accounting for the associations of ions in a CZE setup.