Migration Behavior of Inorganic Anions in Micellar Electrokinetic Capillary Chromatography Using a Cationic Surfactant

Takashi Raneta, Shunitz Tanaka, Mitsuhiko Taga, Hitoshi Yoshida

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The Interactions between Inorganic anions and a cationic surfactant were Investigated using micellar electrokinetic capillary chromatography (MECC). Using cetyltrlmethylammonlum chloride (CTAC) as a cationic surfactant, the effective electrophoretic mobilities of Inorganic anions decreased due to two processes. The first was the Ion association equilibria with a monomeric surfactant below the critical micellar concentration (cmc) and the other was partitioning Into the micelle above the cmc. Fundamental equations for migration of Ionic species In MECC were derived using the effective electrophoretic mobility as an electrochemical parameter. Ion association constants of Inorganic anions with cationic surfactant and distribution coefficients Into the micelle were estimated on the basis of these equations.

Original languageEnglish
Pages (from-to)798-801
Number of pages4
JournalAnalytical Chemistry
Issue number7
Publication statusPublished - Jan 1 1992


ASJC Scopus subject areas

  • Analytical Chemistry

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