Use of cationic polymers for the simultaneous determination of inorganic anions and metal-4-(2-pyridylazo)resorcinolato chelates in kinetic differentiation-mode capillary electrophoresis

O. V. Krokhin, H. Hoshino, O. A. Shpigun, T. Yotsuyanagi

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Three cationic polymers were used as electroosmotic flow and selectivity modifiers for simultaneous determination of inorganic anions and metal-4-(2-pyridylazo)resorcinolato (PAR) chelates. It was shown that the ability of polymers to associate with analytes decreased in the order: poly-(N-ethyl-4-vinylpyridinium bromide)>poly-(diallyldimethylammonium chloride)>Polybrene. CrO42- was chosen as a background electrolyte anion, because it enables indirect W detection of transparent analytes at 254 nm and do not affect the detection sensitivity of chelates at 490 nm. Rapid (4 min) separation of Co(II), Ni(II), and Fe(II)-PAR chelates and of 11 inorganic anions was demonstrated.

Original languageEnglish
Pages (from-to)329-336
Number of pages8
JournalJournal of Chromatography A
Volume776
Issue number2
DOIs
Publication statusPublished - 1997 Aug 1

Keywords

  • Buffer composition
  • Inorganic anions
  • Kinetic differentiation electrophoresis
  • Metal chelates
  • Pyridylazoresorcinolato chelates

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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