聚L-半胱氨酸/还原氧化石墨烯/Nafion修饰玻碳电极对芦丁的电化学传感行为研究  

Electrochemical Detection of Rutinon by Poly-L-cysteine/Reduced Graphene Oxide/Nafion Modified Glassy Carbon Electrode

作　　者：韩海霞 弓巧娟[2] 秦建芳[2] 王玉春[2] 姚陈忠[2] HAN Hai-xia;GONG Qiao-juan;QIN Jian-fang;WANG Yu-chun;YAO Chen-zhong(College of Chemistry and Material Science ,Shanxi Normal University ,Linfen 041000;Department of Applied Chemistry ,Yuncheng University ,Yuncheng 044000)

机构地区：[1]山西师范大学化学与材料科学学院,山西临汾041000 [2]运城学院应用化学系,山西运城044000

出　　处：《分析科学学报》2018年第2期249-252,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.21576230);山西省应用基础研究项目(No.201701D221045);山西省"131"领军人才工程项目

摘　　要：本文采用滴涂法制备了还原氧化石墨烯/Nafion溶液修饰玻碳电极(rGO/Nafion/GCE),用电化学聚合法将L-半胱氨酸(L-Cys)聚合在rGO/Nafion/GCE表面,得到Poly-L-Cys/rGO/Nafion/GCE。采用伏安法研究了芦丁在该修饰电极上的电化学行为及其影响因素。结果表明,L-Cys的电聚合圈数对修饰电极的电化学性能具有一定的影响。在最优条件下,芦丁的峰电流与其浓度在2.0×10^(-8)~1.0×10^(-5) mol/L内呈现好的线性关系,检出限(S/N=3)为1.0×10^(-8) mol/L。In this paper, reduced graphene oxide/Nafion（rGO/Nafion） modified glass carbon electrode was prepared by the drip coating method, and a Poly-L-Cys/rGO/Nafion/GCE modified electrode was fabricated by electropolymerization of L-cysteine on rGO/Nafion/GCE. The electrochemical behavior of rutin on the modified electrode and its influencing factors were investigated by voltammetry. Results revealed that a good adsorption-controlled and two electron transfer process of turin occurred at Poly-L- Cys/rGO/Nafion/GCE. It is also found that the electropolymerization cycles of L-Cys has an influence on the electrochemical properties of the modified electrode. Under optimized conditions, the peak current was linear to the concentration of turin in the range from 2.0 ×10^（-8）-1.0 ×10^（-5）s tool/L, the detection limit was 1.0×10^（-8） mol/L（S/N=3）. The established sensor was used for the determination of turin in compound rutin tablets with satisfactory results.

关 键 词：L-半胱氨酸 还原氧化石墨烯 电化学传感器 伏安法 芦丁 

分 类 号：O657.1[理学—分析化学]