铜掺杂聚L-赖氨酸膜修饰电极的制备及其用于橙汁饮品中抗坏血酸的测定  

Preparation of Copper-doped Poly-L-lysine Film Modified Electrode and determination of Ascorbic Acid in the Juice Drinks

作　　者：胡文娜[1,2] 武佳佳[1] 

机构地区：[1]蚌埠学院应用化学与环境工程系,安徽蚌埠233000 [2]蚌埠学院化工应用技术开发研究所,安徽蚌埠233000

出　　处：《安徽科技学院学报》2016年第1期47-51,共5页Journal of Anhui Science and Technology University

基　　金：安徽省高校自然科学研究项目(113052015kj03);蚌埠学院自然科学研究项目(2011ZR07);蚌埠学院应用化学重点学科项目

摘　　要：利用循环伏安法制备铜掺杂聚L-赖氨酸修饰玻碳电极,并对抗坏血酸的电化学行为进行研究。建立用循环伏安法测定抗坏血酸的新方法。在p H=2.5的磷酸盐缓冲溶液中,扫描速率为180 m V/s,抗坏血酸在修饰电极上产生一灵敏的氧化峰,响应峰电位为0.364 V,抗坏血酸的浓度峰电流在8.0×10^(-5)~8.0×10^(-3)mol/L的范围内有良好的线性关系,检出限为8.0×10^(-7)mol/L。对橙汁饮品进行测定,结果满意。The copper doped poly L- lysine modified electrode was prepared by cyclic voltammetry. The voltammetric behavior of ascorbic acid on the modified electrode was studied and the method was established. In p H =2. 5 phosphate buffer solution,the scanning speed of 180 m V/s,ascorbic acid produced a sensitive oxidation peak on the modified electrode,the peak potential of 0. 364 V. And the peak current of ascorbic acid in the range from 8 × 10^- 5to 8 × 10^ -3mol/L showed a good linear relationship. The detection limit was 8 × 10^- 7mol/L.Measured for orange juice beverage with satisfactory results.

关 键 词：L-赖氨酸 循环伏安法 修饰电极 铜掺杂 抗坏血酸 

分 类 号：O657.15[理学—分析化学]