STEADY-STATE-CURRENT IMPEDANCE SPECTROSCOPY OF PLASTICIZED PVC MEMBRANES CONTAINING NEUTRAL ION CARRIERS

被引：37

作者：

NAHIR, TM

BUCK, RP

机构：

[1] Department of Chemistry, University of North Carolina, Chapel Hill

来源：

ELECTROCHIMICA ACTA | 1993年 / 38卷 / 18期

关键词：

NEUTRAL CARRIERS; PLASTICIZED PVC; IMPEDANCE; VALINOMYCIN; MEMBRANES;

D O I：

10.1016/0013-4686(93)85087-F

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Impedance spectroscopy measurements on plasticized PVC ion-selective membranes containing neutral carriers provided evidence for both bulk and interfacial features. Under steady-state currents, the systems showed concentration polarization of neutral carriers and ionic species. The shortage of neutral carriers at one of the interfaces was correlated with the presence of a low-frequency kinetic semi-circle and a Warburg impedance. The changes in ionic concentration profiles were associated with an increase in bulk membrane resistance and Warburg impedance.

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页码：2691 / 2697

页数：7

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