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.
出处
《应用化学》
CAS
CSCD
北大核心
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)~~
关键词
多贝斯
石墨烯
修饰电极
电催化
calcium dobesilate
graphene
modified electrode
electrocatalysis
