聚四氨基镍酞菁膜修饰电极对甲巯咪唑的电催化氧化

Electrocatalytic Oxidation of Thiamazole by Polymerized Nickel Tetraamino Phthalocyanine Membrane Modified Electrode

用循环伏安法（CV）研究了聚四氨基镍酞菁膜修饰电极（p—NiTAPc／GCE）对甲巯咪唑的电催化氧化行为，在pH=2的磷酸盐缓冲溶液（PBS）中，与未修饰玻碳电极（GCE）相比，甲巯咪唑在p-NiTAPc／GCE上的氧化峰电位（E[a）负移157mV左右，氧化峰电流（Ipa）变为原来的2．6倍多，在2．0×10-5～1．0×10-3mol·L-1范围内有良好的线性关系，回收率在909／6以上，同时，p—NiTAPc／GCE对甲巯咪唑的电催化氧化活性有很高的稳定性。

The electrocatalytic oxidation of thiamazole on a polymerized nickel tetraaminophthalocyanine membrane modified electrode（p NiTAPc/GCE） was investigated by cycl[c vo[tammetry. In a phosphate buffer solution （pH=2.0）, the oxidative peak potential of thiamazole on the p-NiTAPc/GCE shifted negatively for -157 inV. Compared the unmodified carbon fiber electrode, the peak current increased more than 2 times. The calibration curve was linear in the range of 2.0 × 10 5-l. 0 × 10 3 mol· L -1, and the recovery was more than 90 %. The p-NiTAPc/CME showed high stability for electrocatalytic oxidation of thiamazole.