Potential response of liquid ion-exchange membrane electrodes with a weak-acid anion as primary ion, and its dependence on pH.
The potential of a liquid ion-exchange membrane electrode with a weak-acid primary anion has been studied in the pH range 1-12. A mathematical model has been designed for describing the dependence of the potential on pH and including changes of the activity of the primary anion A(-) (of a mono- or dibasic acid) in a test solution, extraction of the membrane ion-exchanger into the test solution by protonation in the acidic region, interference by HSO(-)(4) during adjustment of pH with sulphuric acid.
Malá
Z
Z
Institute of Analytical Chemistry, Czechoslovak Academy of Sciences, Leninova 82, 611 42 Brno, Czechoslovakia.
Senkýr
J
J