An ion selective electrode for mercury(II) based on mercury(II) complex of poly(4-vinyl pyridine)

被引：46

作者：

Bakhtiarzadeh, Fariba ^{[1
]}

Ab Ghani, Sulaiman ^{[1
]}

机构：

[1] Univ Sains Malaysia, Usm 118800, Pulau Pinang, Malaysia

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2008年 / 624卷 / 1-2期

关键词：

Ion selective electrode; Mercury(II); Plasticizer; Poly(4-vinyl pyridine);

D O I：

10.1016/j.jelechem.2008.08.007

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This study reports on the fabrication, characterization and utilization of the heterogeneous poly(Hg(II)-4-vinyl pyridine) membrane electrode. The electrode, with plasticiser tris(2-ethyl hexyl) phosphate, has a Nernstian response with slope of 30 +/- 1 mV decade(-1) in concentration range of 10(-7)-10(-2) M Hg2+, and in solution of pH 3-4. It has response and life time of less than 25 s and more than 120 days, respectively. Limit of detection is at 0.5 x 10(-7) M Hg2+. interferences from other cations are not serious, except silver(l) at mercury(II) concentration less than 10(-4) M. Analyses of water samples show that the proposed electrode agrees well with the standard method with correlation coefficient, R-2, 0.9998. The electrode is also suitable as an indicator electrode in the potentiometric titration of Hg(II) with iodide. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：139 / 143

页数：5

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