The potentiometric response of chemically modified electrodes

被引：58

作者：

Lindino, CA ^{[1
]}

Bulhoes, LOS ^{[1
]}

机构：

[1] UNIV FED SAO CARLOS,DEPT QUIM,BR-13565905 SAO CARLOS,SP,BRAZIL

来源：

ANALYTICA CHIMICA ACTA | 1996年 / 334卷 / 03期

关键词：

sensors; conducting polymer; potentiometry;

D O I：

10.1016/S0003-2670(96)00360-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical polymerization of ortho-methoxyaniline and ortho-methylaniline was studied on platinum electrodes. The electrochemical response of electropolymerized films exhibits three well-defined redox processes similar to those observed for polyaniline. The potentiometric response of these electrodes was analyzed, and the polymeric film prepared with ortho-methylaniline showed a better response as a pH sensor than that prepared with ortho-methoxyaniline. The electrode prepared with poly(ortho-methylaniline) showed an apparent Nernstian response in a 1-12 pH range with a slope of 63.8 mV/decade, while the linear range of the electrode prepared by poly(ortho-methoxyaniline) exhibited a linear relationship in the 2-11 pH range with a slope of 62.0 mV/decade.

引用

页码：317 / 322

页数：6

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