Oxidation and detection of L-cysteine using a modified Au/Nafion/glass carbon electrode

作     者：WANG XueJi ZHANG LiLi MIAO LiXiao KAN MeiXiu KONG LinLin ZHANG HuiMin 

作者机构：School of Science Beijing Institute of Technology Beijing 100081 China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2011年第54卷第3期

页      面：521-525页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(20875008) 

主　　题：L-cysteine composite film gold nanoparticles Nafion detection 

摘      要：In this work,the electrochemical oxidation of L-cysteine(CySH)was investigated on a composite film modified electrode with Au nanoparticles dispersed in the fluorocarbon polymer(Nafion).The excellent electrocatalytic effect on CySH oxidation was attributed to the role of Au *** voltammetric studies revealed two anodic peaks for the oxidation of CySH in the pH range of 2.0–*** electrode was used to detect cysteine at pH 2.0 and pH *** pH 2.0,a determination range of 3.0–50.0?mol/L was obtained with the detection sensitivity of 22.7A/(mmol L1),while at pH 7.0,a determination range of 2.0–80.0mol/L was obtained with the detection sensitivity of 4.08A/(mmol L1).The detection limits were estimated to be as low as 1.0?mol/L at both pH 7.0 and pH ***,at pH 7.0,the interferences of ascorbic acid and uric acid were reduced for the detection of *** made the Au/Nafion/GC electrode a promising candidate for efficient electrochemical sensors for the detection of CySH.