Abstract
A solid-state ion selective electrode, which is sensitive to hydroxide ion concentration has been prepared. This electrode with a 10% Cu 2 S and 90% Ag 2 Se composition exhibited an analytically useful potential change from 10 −6 to 10 −1 M hydroxide ion, pH 8–13. The slope of linear portion is about 58 mV per decade change in hydroxide concentration. There was no interference of K + , Na + , Ca 2+ , Zn 2+ and Mg 2+ cations and Cl − , NO 3 − and SO 4 2− anions. The response time was 30 s and the lifetime was about 2 years.
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