Effect of applied curent on copper sulphide-based ion-selective electrodes

E. G. Harsányi, K. Tóth, E. Pungor, M. Soma, Y. Umezawa

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Abstract

The properties of precipitate-based copper sulphide electrodes are investigated. Solid-phase studies wre done by x-ray photoelectron spectroscopy and solution-phase studies by combined potentiometric and atomic absorptioni spectrometric techniques. The predominant valence state of copper in the copper sulphide samples is shown to be Cu(I), but Cu(II) can also be identified at the surfaces. The oxidation of the membrane surface results in dissolution of copper ion and a decrease in the Cu/S ratio in the solid phase; reduction of the surface causes sulphide dissolution and an increase in the Cu/S ratio. Application of anodic or cathodic curents was used to study the redox behaviour of the copper suphide memebrane.

Original languageEnglish
Pages (from-to)227-235
Number of pages9
JournalAnalytica Chimica Acta
Volume200
Issue numberC
DOIs
Publication statusPublished - 1987

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

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