Donnan exclusion failure in low anion site density membranes containing valinomycin

Richard P. Buck, K. Tóth, Etelka Graf, G. Horvai, Erno Pungor

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The theory of Donnan Exclusion Failure of carrier-containing, low-fixed site density membranes has been derived, for high carrier loadings. The precarious character of commercial PVC samples for membrane applications, because of the low site densities is illustrated by the ease of Donnan Failure induced by bromide, nitrate, iodide, and thiocyanate. The theory is checked by a correlation between potentiometric response maxima (the onset of Failure), and independently determined salt extraction coefficients. Massive uptake of salt, under Donnan Failure conditions, was illustrated by comparing impedance spectra of KSCN with KCl as bathing electrolytes.

Original languageEnglish
Pages (from-to)51-66
Number of pages16
JournalJournal of Electroanalytical Chemistry
Volume223
Issue number1-2
DOIs
Publication statusPublished - May 25 1987

Fingerprint

Valinomycin
Anions
Negative ions
Salts
Membranes
Iodides
Bromides
Polyvinyl Chloride
Polyvinyl chlorides
Nitrates
Electrolytes
potassium thiocyanate
thiocyanate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Donnan exclusion failure in low anion site density membranes containing valinomycin. / Buck, Richard P.; Tóth, K.; Graf, Etelka; Horvai, G.; Pungor, Erno.

In: Journal of Electroanalytical Chemistry, Vol. 223, No. 1-2, 25.05.1987, p. 51-66.

Research output: Contribution to journalArticle

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