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

被引：1
作者：
Fangyuan Zhao
Fei Wang
Weining Zhao
Jing Zhou
Yang Liu
Lina Zou
Baoxian Ye
机构：
[1] Zhengzhou University,Department of Chemistry
[2] Henan Institute of Engineering,Department of Material and Chemistry Engineering
来源：
Microchimica Acta | 2011年 / 174卷
关键词：
Caffeine; Nafion; Graphene oxide; Modified electrode; Voltammetry;
D O I：
暂无
中图分类号：
学科分类号：
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 × 10−7 to 8.0 × 10−5 mol L−1, with a detection limit of 2.0 × 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.
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页码：383 / 390
页数：7
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