Influence of cationic polymers on separation selectivity in kinetic differentiation mode capillary electrophoresis of metal-4-(2- pyridylazo)resorcinolato chelates

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

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

The influence of four kinds of cationic polymers on electrophoretic mobilities of V(V), Co(II), Ni(II), and Fe(II)-4-(2-pyridylazo)resorcinolato chelates was investigated in kinetic differentiation mode capillary electrophoresis (CE). It was shown that the addition of cationic polymers strongly changes selectivity of such a type of separation. Four parameters of carrier electrolyte (pH, counter-ion, polymer and acetonitrile concentrations) were changed to examine the elution order of the complexes. The behaviour of the chelates can be described in terms of ion-exchange separation. Fast separation of the four chelates with efficiency of more than 450 000 theoretical plates per meter in CE with reversed polarity power supply was easily performed.

Original languageEnglish
Pages (from-to)339-346
Number of pages8
JournalJournal of Chromatography A
Volume772
Issue number1-2
DOIs
Publication statusPublished - 1997 Jun 6

Keywords

  • 4-(2-Pyridylazo)resorcinol complexes
  • Buffer composition
  • Metal chelates

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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