鞣酸在玻碳电极上的电化学行为与检测  

Electrochemical Behavior and Determination of Tannic Acid on Glassy Carbon Electrode

作　　者：熊健[1] 李伟[1] 李容[2] XIONG Jian LI Wei LI Rong(Science School, Tibet University, Lhasa 850000, China Institute of Chemical Engineering, China West Normal University,Nanchong 637002, China)

机构地区：[1]西藏大学理学院,西藏拉萨850000 [2]西华师范大学化学化工学院,四川南充637002

出　　处：《化工技术与开发》2016年第11期30-33,共4页Technology & Development of Chemical Industry

摘　　要：本文采用循环伏安法研究了鞣酸在玻碳电极上的电化学行为,并讨论了电解质溶液、溶液pH、扫描速率等因素的影响。测定了电极反应的部分动力学参数。结果表明,该电极过程受吸附-扩散混合控制,反应转移的电子数与质子数相等即m=n=1,电极有效面积A=10.60mm^2,扩散系数D=4.315×10^(-5)cm^2·s^(-1)。其氧化峰电流在1.0×10^(-4)~2.0×10^(-6)mol·L^(-1)范围内呈线性关系,检测限为1.0×10^(-6)mol·L^(-1),加标回收率为98.92%~103.0%。The electrochemical behaviors of tannic acid on a glassy carbon electrode with cyclic voltammetry was studied, the effectof electrolyte solution, solution pH, scan rate and other factors, was discussed, some kinetic parameters of the electrode reaction weredetermined. The results showed that the electrode process was controlled by diffusion, the reaction transferred the same number of electronsand protons that m=n=1, the electrode effective area A=10.60mm^2, the diffusion coefficent D=4.315×10^-5cm^2/s. The oxidation peakcurrent was linear within 1.0×10^-4-2.0×10^-6 mol/L while the detection limit was 1.0×10^-6mol/L, and the standardized recovery ratewas 98.92%-103.0%.

关 键 词：鞣酸 玻碳电极 循环伏安法 电化学行为 

分 类 号：O657.1[理学—分析化学]