The potentiometric response of chemically modified electrodes

被引：57
|
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
收藏
页码：317 / 322
页数：6
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