A polypyrrole-coated, piezoelectric sensor for CrVI.: Preliminary results

被引：11
|
作者：
Desimoni, E [1 ]
Bassani, I [1 ]
机构：
[1] Univ Milan, DIFCA, I-20133 Milan, Italy
来源：
ANALYTICAL COMMUNICATIONS | 1999年 / 36卷 / 02期
关键词：
D O I：
10.1039/a809667h
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The piezoresonators of a quartz-crystal microbalance mere surface-coated with electropolymerised polypyrrole films. After potentiostatic reduction at -0.9 V, the reduced PPy-coated resonators were allowed to react with solutions containing different concentrations of Cr-VI. Mass changes of the polymer film, originated by ionic transfer during the oxidation reaction of PPy by hexavalent chromium, produced frequency shifts proportional to the concentration of Cr-VI. Also, frequency shifts were obtained by reaction of some antioxidants at oxidised PPy-coated resonators. The observed responses depend on several experimental parameters.
引用
收藏
页码：45 / 46
页数：2
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