抗坏血酸在聚对氨基苯甲酸修饰电极上的电催化氧化  

Electrocatalytic Oxidation of Ascorbic Acid at Poly(p-Aminobenzoic Acid)Modified Electrode

作　　者：韩俊凤[1] 许洪梅[1] 蔡雪[1] 张黎[1] 姜丽伟[1] 魏思宇[1] 

机构地区：[1]牡丹江师范学院化学化工学院,黑龙江牡丹江157011

出　　处：《分析科学学报》2013年第6期882-884,共3页Journal of Analytical Science

基　　金：牡丹江市科学技术计划(Z2013g001);牡丹江师范学院科学技术研究项目(G201208)

摘　　要：通过循环伏安法制备了聚对氨基苯甲酸修饰玻碳电极（P—PABA／GCE），并研究了抗坏血酸（AA）在该电极上的电化学行为。结果表明：p-pABA／GCE对AA的氧化具有良好的电催化作用，氧化峰电位负移238MV，峰电流比裸电极增大约两倍。氧化峰电流与AA浓度在2．27×10-82．73×10-3mol·L-1范围内呈线性关系，相关系数为0．992，检出限（s／N=3）为6．0×10-2mol·L-1该修饰电极可作为性能良好的传感器用于AA的分析测定。Poly（p-aminobenzoic acid） modified glassy carbon electrode was prepared by cyclic voltammetry and the electrochemical behavior of ascorbic acid at the modified electrode was investigated. It was found that the modified electrode showed significantly high electrocatalytic activity to the oxidation of ascorbic acid. The anodic peak potential of ascorbic acid shifted negatively by 238 mV and the sensitivity of the modified electrode in the determination of ascorbic acid increased about two-fold. The linear range was 2.27 X 10-6 -2.73 X 10-3 tool. I. It was demonstrated that the poly（p-aminobenzoic acid） modified electrode could be used as the sensor for the quantitative determination of ascorbic acid.

关 键 词：对氨基苯甲酸 抗坏血酸 电催化 

分 类 号：O657.1[理学—分析化学]