摘要
在玻碳电极(GCE)表面上修饰了一层导电聚合物 聚吡咯(Ppy)薄膜,用循环伏安法制备了新型的基于电流响应的掺杂碘离子的聚吡咯修饰电极;研究了电极的电化学特性。此修饰电极对碘离子的响应是基于碘离子在Ppy膜与电解质溶液中的掺杂平衡以及Ppy膜中的碘离子在修饰电极表面的氧化还原过程;制成的电流型电极对5 0×10-2mol/L～1 0×10-5mol/L的碘离子呈良好的线性响应关系,检出限为6 0×10-6mol/L。
<Abstrcat>Pyrrole was polymerized on a glassy carbon electrode by cyclic volatmmetry, I- was then modified on the polymer electrode.The electrode was used to determine I- in solution. Various factors affecting the chemically modified electrode were studied. The linear response of I- was 5.0×10-2 to 1.0×10-5 mol/L with detection limit of 60×10-6 mol/L. The response mechanism of the electrode was based on I- doping into the surface of polypyrrole.
出处
《分析试验室》
CAS
CSCD
北大核心
2002年第4期10-12,共3页
Chinese Journal of Analysis Laboratory
基金
广东省科技攻关项目(C31902)
