聚4-(2-吡啶偶氮)间苯二酚膜修饰玻碳电极测定过氧化氢  

Determination of Hydrogen Peroxide Using 4-(2-Pyridylazo)-Resorcinol Polymer Film Modified Glassy Carbon Electrode

作　　者：刘彩胜[1] 乔海燕[2] 古宁宇[1] 唐纪琳[2] 

机构地区：[1]南昌大学化学系,南昌330031 [2]中国科学院长春应用化学研究所电分析化学国家重点实验室,长春

出　　处：《应用化学》2012年第2期216-221,共6页Chinese Journal of Applied Chemistry

基　　金：江西省科技支撑项目(2010BGB01001)资助

摘　　要：利用循环伏安法(-0.5～2.2 V)将4-(2-吡啶偶氮)间苯二酚(PAR)电聚合修饰到玻碳电极表面,制备了聚PAR膜过氧化氢(H2O2)传感器。并采用循环伏安法和计时安培法研究了修饰电极的电化学性质和对H2O2的响应特性。结果表明,PAR膜修饰电极在低的电位下对H2O2具有优异的电催化还原效应。在磷酸盐缓冲溶液中(pH=8.0)用计时安培法对H2O2进行了测定(工作电位0.45 V),响应电流与其浓度在2×10-5～1.76×10-3 mol/L范围内呈良好的线性关系,线性相关系数r=-0.999 83,检测限(S/N=3)为3μmol/L。该修饰电极灵敏度高、稳定性好、制备简单,在H2 O2的测定中对抗坏血酸、尿酸和葡萄糖有较好的抗干扰性。A sensor for determination of hydrogen peroxide （H2O2） based on 4-（2-pyridylazo ）-resorcinol （PAR） polymer film modified glassy carbon electrodes （GCE） was fabricated. Electrochemical properties and characteristics of the PAR polymer film modified electrode for H2 O2 reduction were investigated using cyclic voltammetry and chronoamperometry methods. The results showed that the modified electrode exhibited good elect.rocatalytic activity towards the reduction of HE O2 at a low potential. The chronoamperometric detection of H202 was carried out at -0.45 V in O. 1 mol/L phosphate buffered solution（ pH = 8.0）. The peak currents of H202 reduction varied linearly with the concentration in the range of 2 × 10 ^-5 - 1.76 × 10^-3 mol/L, with a linearly dependent coefficient r = - 0. 99983, the detection limit （ S/N = 3 ） was 3 μmol/L. The modified electrode showed high sensitivity, good stability, easy preparation and exhibited better anti-interference to ascorbic acid, uric acid and glucose.

关 键 词：(吡啶偶氮)间苯二酚 过氧化氢 循环伏安法 计时安培法 

分 类 号：O657.1[理学—分析化学]