Studies of quaternary ammonium ion interference on potassium ion-selective electrodes |
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| Authors: | Andrzej Lewenstam, Eija Erkola Alfred Lehmenkü hler |
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| Affiliation: | (1) Laboratory of Analytical Chemistry, Åbo Akademi University, SF-20500 Åbo-Turku, Finland;(2) Research and Development Group, KONE Instruments, SF-02320 Espoo, Finland;(3) I. Physiologisches Institut der Universität, W-4400 Münster, Germany |
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| Abstract: | Summary The influence of quaternary ammonium chlorides on potassium ion-selective electrodes is described. The observed decrease of sensitivity towards potassium ions, up to quasi-Nernstian towards chloride ions in the extreme case, is explained by ion-partition and ion-exchange processes at the membrane surface. A scheme of interference pathways is presented and a possibility of eliminating undesirable influences is given.Dedicated to Professor Dr. Wilhelm Fresenius on the occasion of his 80th birthday |
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