Potentiometric detection of monovalent anions separated by ion chromatography using all solid-state contact PVC matrix membrane electrode


IŞILDAK İ.

CHROMATOGRAPHIA, vol.49, pp.338-342, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49
  • Publication Date: 1999
  • Doi Number: 10.1007/bf02467567
  • Title of Journal : CHROMATOGRAPHIA
  • Page Numbers: pp.338-342
  • Keywords: column liquid chromatography, ion chromatography, monovalent anions determination, potentiometric detection, ion selective PVC-matrix electrode, METALLIC COPPER ELECTRODE, SELECTIVE ELECTRODE, LIQUID-CHROMATOGRAPHY, FLOW-INJECTION, SYSTEMS, ACIDS

Abstract

An all solid-state contact tubular PVC-matrix membrane electrode has been applied for potentiometric detection of inorganic and organic monovalent anions using phosphate and hydrogen phosphate eluents at low concentrations. This is a "monovalent detection method" as the selectivity of the electrode towards monovalent anions results in some other anions being undetected unless the concentration of those other anions is higher than 10(-3) mol dm(-3) in the sample solution injected. It takes only eight minutes to complete the separation with a good resolution. Theoretical and practical considerations are discussed, and in particular, sensitivity, linearity, detection limit and dynamic behaviour are presented.