Carbon composition PVC based membrane in a highly selective and sensitive coated wire electrode for silver ion

被引：38

作者：

Abbaspour, A ^{[1
]}

Izadyar, A ^{[1
]}

Sharghi, H ^{[1
]}

机构：

[1] Shiraz Univ, Fac Sci, Dept Chem, Shiraz 71454, Iran

来源：

ANALYTICA CHIMICA ACTA | 2004年 / 525卷 / 01期

关键词：

CWE; carbon; 2-[(2-{2-[(2-carboxyphenyl)sulfanyl]ethoxy}; ethyl)sulfanyl] benzoic acid; silver;

D O I：

10.1016/j.aca.2004.07.074

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The utility of carbon as a new component in a highly selective and sensitive coated wire electrode (CWE) for silver ion using 2-[(2-{2-[(2-carboxyphenyl)sulfanyl]ethoxy}ethyl)sulfanyl] benzoic acid as ionophore is demonstrated. This CWE exhibits a good Nernstian slope of 59.0+/-1 mV per decade in a wide linear concentration range of 2.0 x 10(-8) to 1.0 X 10(-2) M for AgNO3. The detection limit of this electrode is 1.2 x 10(-8) M of AgNO3. This sensor has a short response time of about 10s and could be used in a pH range of 2.5-8.7. High selectivity was obtained over seventeen various metal ions. The electrode is reproducible and stable for a period of two months. The proposed electrode has been used as an indicator electrode in potentiometric titration. This CWE was successfully applied in determination of silver in sulphadiazine cream and in fruit juice matrixes. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：91 / 96

页数：6

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BARERRA PM, 1998, MIKROCHIM ACTA, V129, P71

[12] Study of chemical modifiers for direct determination of silver in sea water by ETA-AAS with deuterium background correction [J].