多贝斯在石墨烯修饰玻碳电极上的电化学行为及其测定  

Electrochemical Behavior and Determination of Calcium Dobesilate at Graphene Modified Glassy Carbon Electrode

作　　者：张亚[1] 杜芳艳[1] 郑建斌[2] 

机构地区：[1]榆林学院化学与化学工程学院,榆林719000 [2]西北大学分析科学研究所,西安710069

出　　处：《应用化学》2014年第7期860-864,共5页Chinese Journal of Applied Chemistry

基　　金：陕西省科技厅项目(2010JM2017);榆林学院项目(10GK02)~~

摘　　要：制备了石墨烯修饰玻碳电极（GN/GCE）.在0.05moL/L H2SO4溶液中,用循环伏安法研究了多贝斯在GN/GCE上的电化学行为.结果表明,GN/GCE对多贝斯的氧化还原反应有明显的电催化作用.建立了测定多贝斯的新方法,用微分脉冲伏安法测得多贝斯的氧化峰电流与其浓度在2.0×10^-9～1.2×10^-6 mol/L范围内呈线性关系,检出限为1.0×10^-9 mol/L（S/N =3）.该法可用于胶囊中多贝斯的测定,修饰电极有较好的稳定性和重新性.A graphene modified glassy carbon electrode （GN/GCE） was prepared.The electrochemical behavior of calcium dobesilate on the modified electrode was investigated in 0.05 mol/L H2SO4 by cyclic voltammetry.The GN/GCE shows an obvious electrocatalytic activity toward the redox reaction of calcium dobesilate and a new method for the determination of calcium dobesilate is established.On differential pulse voltammetry curves,a linear dependence of oxidation current versus calcium dobesilate concentration is obtained in the range of 2.0 × 10^-9 ～ 1.2 × 10^-6 mol/L,with a detection limit of 1.0 × 10^-9 mol/L（S/N =3）.The proposed method was applied to determine calcium dobesilate in capsule.The modified electrode shows excellent stability and reproducibility.

关 键 词：多贝斯 石墨烯 修饰电极 电催化 

分 类 号：O655[理学—分析化学]