Determination of caffeine at a Nafion-covered glassy carbon electrode

被引：100

作者：

Brunetti, Barbara ^{[1
]}

Desimoni, Elio ^{[1
]}

Casati, Paolo ^{[1
]}

机构：

[1] Univ Milan, DiProVe, I-20133 Milan, Italy

来源：

ELECTROANALYSIS | 2007年 / 19卷 / 2-3期

关键词：

caffeine; Nafion; voltammetry; polymer-coated electrodes; cola beverages;

D O I：

10.1002/elan.200603679

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学]; 081704 [应用化学];

摘要：

A simple differential pulse voltammetric method based on a Nafion-covered glassy carbon electrode was developed for the quantitative determination of caffeine in cola beverages. The modified electrode exhibits a clear improvement of the current response compared to that observed at a bare glassy carbon electrode. The method allows quantifying the analyte in the 9.95 x 10(-7)-1.06 x 10(-5) M range, with a detection limit of 7.98 x 10(-7) M in 0.1 M sulfuric acid solutions. The developed procedure was tested by recovery studies. The results are described and discussed in the light of the existing literature.

引用

页码：385 / 388

页数：4

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