Voltammetric sensor for caffeine based on a glassy carbon electrode modified with Nafion and graphene oxide

被引：66
|
作者：
Zhao, Fangyuan [1 ]
Wang, Fei [1 ,2 ]
Zhao, Weining [1 ]
Zhou, Jing [1 ]
Liu, Yang [1 ]
Zou, Lina [1 ]
Ye, Baoxian [1 ]
机构：
[1] Zhengzhou Univ, Dept Chem, Zhengzhou 450001, Peoples R China
[2] Henan Inst Engn, Dept Mat & Chem Engn, Zhengzhou 450007, Peoples R China
来源：
MICROCHIMICA ACTA | 2011年 / 174卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
Caffeine; Nafion; Graphene oxide; Modified electrode; Voltammetry; FILMS;
D O I：
10.1007/s00604-011-0635-y
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report on a voltammetric sensor for caffeine that is based on a glassy carbon electrode modified with Nafion and graphene oxide (GO). It exhibits a good affinity for caffeine (resulting from the presence of Nafion), and excellent electrochemical response (resulting from the pressence of GO) for the oxidation of caffeine. The electrode enables the determination of caffeine in the range from 4.0 x 10(-7) to 8.0 x 10(-5) mol L-1, with a detection limit of 2.0 x 10(-7) mol L-1. The sensor displays good stability, reproducibility, and high sensitivity. It was successfully applied to the quantitative determination of caffeine in beverages.
引用
收藏
页码：383 / 390
页数：8
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