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首页> 外文期刊>Journal of Applied Polymer Science >Detection and determination of Cr-VI in solution using polyaniline modified quartz crystal electrode
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Detection and determination of Cr-VI in solution using polyaniline modified quartz crystal electrode

机译：聚苯胺修饰石英晶体电极检测和测定溶液中的六价铬

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摘要

Conducting polymers such as polvaniline and polypyrrole exhibit novel sensoric properties and are able to interact chemically or electrochemically with the species of interest for detection. In the current investigation, construction of a sensor based on an electrochemical reaction between Cr-VI and a thin layer of polyaniline, coated at the surface of quartz crystal electrode, is reported. Polyaniline was synthesized, electrochemically, at the surface of quartz crystal electrode. It was then reduced at -0.1 V versus Ag/AgCl. The modified electrode was exposed to various concentrations of Cr-VI solutions ranging from 10(-7) to 10(-1) M. Mass changes of the polymer-modified electrode due to the reaction between Cr-VI and polyaniline was found to be linear, corresponding to the concentration of Cr-VI. The experiments in both acidic and nonacidic conditions were performed. In both conditions, linear double-logarithmic calibration curves of mass change of the polymer film versus Cr-VI concentration were obtained. (C) 2002 Wiley Periodicals, Inc. [References: 29]
机译：导电聚合物（如polvaniline和聚吡咯）显示出新颖的感官特性，并且能够与感兴趣的物种进行化学或电化学相互作用以进行检测。在当前的研究中，报道了一种基于Cr-VI和涂覆在石英晶体电极表面的聚苯胺薄层之间的电化学反应而构建的传感器。在石英晶体电极的表面以电化学方式合成了聚苯胺。然后在相对于Ag / AgCl的-0.1V下将其还原。将该修饰电极暴露于浓度范围从10（-7）到10（-1）M的Cr-VI溶液中。发现由于Cr-VI与聚苯胺之间的反应引起的聚合物修饰电极的质量变化是线性，对应于六价铬的浓度。在酸性和非酸性条件下进行了实验。在这两种条件下，均获得了聚合物膜质量变化与Cr-VI浓度的线性对数校准曲线。 （C）2002 Wiley Periodicals，Inc. [参考：29]

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