A STUDY OF THE EFFECT OF AQUEOUS COMPONENTS UPON ION TRANSFER ACROSS THE POLYMER WATER INTERFACE

被引：8

作者：

ARMSTRONG, RD

PROUD, WG

机构：

[1] Electrochemistry Research Laboratories, The Department of Chemistry, The University, Newcastle upon Tyne, NE1 7RU, The Bedson Building

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 295卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(90)85013-U

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The impedance spectra from studying a wide range of potassium concentrations (10-1-10-6 M) in aqueous solutions in contact with valinomycin containing plasticised polymer membranes are reported. For membranes where the K+ valinomycin ratio in the membrane is 10:1 (typical of the ratio found in actual sensors) the interfacial impedance (a Warburg impedance) can be detected only as concentrations of K+ in the solution fall below 2 × 10-6 M. A related system involving the transfer of tetraphenylarsonium ions which shows similar behaviour is also reported. The presence of albumin in the aqueous phase does not change the behaviour of the K+ exchanging membranes. However when ionic surfactants are added to the aqueous phase they are transferred into the membrane phase. © 1990.

引用

页码：163 / 168

页数：6