P_2W_(18)杂多酸-萘胺修饰电极研制及应用

Preparation and Application of P2W18-NPA _ Modified Electrode

研制了Dawson型杂多酸P2W18-1_萘胺化学修饰电极 ,采用循环伏安法等方法研究了聚合膜电极的电化学特性。在弱酸性介质中 ,电极对亚硝酸根的氧化有电催化作用。亚硝酸盐的浓度在1×10 -6～1×10-4mol/L范围内 ,催化电流与亚硝酸根浓度成线性关系。电极用于水样中NO2- 含量测定 。

The preparation and application of the P2W18 heteropolyacid-naphthylamine _ modified elec_trode is described. The electrochemical characteristics of the film electrode were studied by cyclic voltammetry and other methods. In mild acid medium, the electrode can electrocatalyze the oxidation of . The method has a good linearity in the range of 1×10-6～1×10-4 mol/L for . The electrode was verified by the determination of nitrite in water of Xiangjiang River.