pH sensor based on deposited film of lead oxide on aluminum substrate electrode

被引:77
作者
Eftekhari, A [1 ]
机构
[1] KN Toosi Univ Technol, Dept Chem, Tehran, Iran
来源
SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 88卷 / 03期
关键词
pH sensor; nerustian slope; lead oxide; solid film; modified electrode; Al electrode; CHEMICAL SENSOR; HEXACYANOFERRATE; POLYANILINE;
D O I
10.1016/S0925-4005(02)00321-0
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Two modified electrodes were fabricated by deposition of thin films of alpha-PbO2 and beta-PbO2 on aluminum substrate electrodes. Both electrodes exhibit potentiometric response to the hydrogen ion concentration and, consequently, can be used as pH sensors. The potentiometric responses of the modified electrodes were close to the theoretical slope of Nerustian response and comparable with glass electrodes. The electrochemical properties and stability of the constructed electrode were investigated. The possibility of the pH sensor for using in flow injection analysis (FIA) was also studied, and the optimum conditions were obtained. (C) 2002 Published by Elsevier Science B.V.
引用
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页码:234 / 238
页数:5
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