Amperometric detection of alkali metal ions on micro-fabricated composite polymer membranes

被引：67

作者：

Lee, HJ ^{[1
]}

Beriet, C ^{[1
]}

Girault, HH ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Electrochim, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 453卷 / 1-2期

关键词：

alkali metal ion transfer; polymer membrane; amperometric sensor; dibenzo-18-crown-6; valinomycin;

D O I：

10.1016/S0022-0728(98)00171-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Transfer reactions of alkali metal ions, either direct or facilitated by the ionophores dibenzo-18-crown-6 and valinomycin, have been studied at the water\2-nitrophenyloctylether-polyvinyl chloride gel micro-interface. The polarised micro-hole array interface between water and the composite polymer membrane is used as a selective transducer for the amperometric detection of alkali metal ions. The formal Gibbs transfer energies of ion transfer from the aqueous phase to the 2-nitrophenyloctylether-polyvinyl chloride gel phase are evaluated from voltammetric measurements. The association constants are calculated to determine the selectivity imparted by the ionophores such as dibenzo-18-crown-6 and valinomycin on transferring the alkali metal ion at the gel micro-interface. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：211 / 219

页数：9

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