Abstract
Summary The loose external part of the gel layer of a hydrogen-ion-selective glass electrode acts as a cation exchanger with fixed anion sites. In the last period of a complete ion exchange the rate of the process is governed by the ion present in deficit in the exchanger. Estimates of self-diffusion coefficient ratios for interdiffusing ions have been made by using the result obtained from e.m.f. measurements and by applying the time lag function. The e.m.f. measurements were performed during the apparently complete ion-exchange process in the gel layer of the glass electrode.
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