ER-GO-MCFE/毛细管电泳法测定饮料中的抗坏血酸  

Measurement of Ascorbic Acid in Functional Drink by Capillary Electrophoresis with Electrochemically Reduced Graphene Oxide Modified Electrode

作　　者：王军[1] 刘冬菊[1] 赵满[1] 王晓蕾[1] 

机构地区：[1]山东师范大学化学化工与材料科学学院,山东济南250014

出　　处：《滨州学院学报》2014年第3期100-104,共5页Journal of Binzhou University

基　　金：山东省研究生教育创新计划项目(SDYY13012)

摘　　要：制备了电化学还原氧化石墨烯修饰碳纤维微盘电极（ER-GO-MCFE）,将此电极与毛细管电泳联用,对氧化石墨烯的电化学还原时间和电位、缓冲溶液的浓度和pH值、分离电压和检测电位等条件进行了优化。在最佳条件下,抗坏血酸的线性范围为1.0×10^-6～1.0×10^-5mol/L和1.0×10^-5～0.8×10^-3 mol/L,线性相关系数分别为0.9985和0.9998;当信噪比为3时,检测下限为6.5×10^-7 mol/L。将此电极用做毛细管电泳电化学检测的工作电极,实现了对饮料样品中的抗坏血酸的定性和定量检测。In this paper,the electrochemically reduced graphene oxide modified carbon fiber microdisk electrode（ER-GO-MCFE）is fabricated to be the detector of capillary electrophoresis-electrochemical detection and developed to detect ascorbic acid（AA）.The reduction time and potential of graphene oxide,the concentration of buffer solution and pH,the separation voltage and working potential are investigated.Under the optimization conditions,the concentration of linear range of AA is from 1.0×10^-6to 1.0×10^-5 mol/L and 1.0×10^-5 to 0.8×10^-3 mol/L.The linear correlation coefficients are 0.9985 and 0.9998.The limit of detection of AA is 6.5×10^-7 mol/L（S/N=3）.The concentration of AA in functional drink is measured by capillary electrophoresis with ER-GO-MCFE.

关 键 词：毛细管电泳 还原氧化石墨烯 抗坏血酸 功能饮料 

分 类 号：O657.1[理学—分析化学]