基于分子印迹技术构建对对硫磷农药选择性响应的电化学平台(英文) 被引量：2

An Electrochemical Platform for Selective Response to Parathion Based on Molecularly Imprinted Membrane Technique

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摘要以壳聚糖作为基体聚合物、对硫磷为模板分子、以硅酸四乙酯为交联剂制备了对硫磷分子印迹膜.该印迹膜被固定于玻碳电极表面构建了分子印迹膜电极,通过检测示差脉冲伏安信号,实现了对有机农药对硫磷的选择性测定.在优化的实验条件下,峰电流与对硫磷浓度在1-10μg/L(ppb)范围内有良好的线性关系,检测限可达24ng/L(ppt).该电化学平台的构建为对硫磷的选择性测定提供了新的途径. A chitosan（CS）/tetraethyl orthosilicate（TEOS） hybrid molecularly imprinted membrane was prepared using CS as bulk polymer,parathion as template molecules and TEOS as crosslinking agent.The molecularly imprinted membrane can be fabricated directly on glassy carbon electrode to construct a molecularly imprinted membrane modified electrode and the electrode can be used for the selective detection of parathion in aqueous solutions with a differential pulse voltammetric technique.The peak current signal from imprinted molecular,parathion,is dependent linearly on its concentration in the range from 1 to 10 μg/L,and the limit of detection obtained is 24 ng/L.The as-prepared electrode provides a new way for selectively detecting parathion.

作者赵广超徐雅琦

机构地区安徽师范大学环境科学与工程学院

出处《安徽师范大学学报（自然科学版）》 CAS 北大核心 2010年第3期250-254,共5页 Journal of Anhui Normal University(Natural Science)

基金 Supported by National Natural Science Foundation of China(20975001)

关键词分子印迹膜对硫磷电化学检测 molecularly imprinted membrane parathion electrochemical detection

分类号 O657.1 [理学—分析化学]

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