Effects of controlled current on the response behavior of polymeric membrane ion-selective electrodes
Effects of controlled current on the response behavior of polymeric membrane ion-selective electrodes
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DOI：
10.1016/s0022-0728(02)00756-8
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发表时间：
2002-05-17
影响因子：
4.5
通讯作者：
Pretsch, E
中科院分区：
文献类型：
--
作者：
Morf, WE;Badertscher, M;Pretsch, E
从理论上分析了外加电流对聚合物膜离子选择电极（ISE）电位响应的影响。的治疗是基于良好建立的电位模型的伊势膜，通过电流和相应的电渗析离子通量通过膜的贡献扩展。推导出一般隐式解，该解分别根据外部电流、膜的选择性特征以及膜、样品溶液和内溶液的组成来描述潜在响应。明确的关系给出了限制的情况下，例如，当只有一种阳离子存在于溶液中，或当干扰阳离子的干扰是小的。对于后者的情况下，理论曲线进行比较，实验的，并给出了良好的对应关系。(C)2002 Elsevier Science B.V.保留所有权利。
The influence of external currents on the potential response of polymeric membrane ion-selective electrodes (ISEs) is analyzed theoretically. The treatment is based on the well-established potential model of ISE membranes, extended by contributions from current flow and corresponding electrodialytic ion fluxes through the membrane. A general implicit solution is derived that describes the potential response in terms of the external current, the selectivity characteristics of the membrane, and the compositions of the membrane, the sample solution, and the inner solution, respectively. Explicit relationships are given for limiting cases, e.g. when only one kind of cation is present in the solution or when the disturbance by interfering cations is small. For the latter case, theoretical curves are compared to experimental ones and are shown to give a good correspondence. (C) 2002 Elsevier Science B.V. All rights reserved.