Voltammetric Determination of Caffeine in Energy Drinks Using an Electrode Modified with a Nafion Film and Mixed-Valence Iridium Oxides

IF 1 4区化学 Q4 CHEMISTRY, ANALYTICAL

Journal of Analytical Chemistry Pub Date : 2024-06-21 DOI:10.1134/s1061934824700096

L. G. Shaidarova, I. A. Chelnokova, D. A. Koryakovtseva, D. A. Kirilenko, H. C. Budnikov

引用次数: 0

Abstract

It is found that mixed-valence iridium oxides electrodeposited on the surface of a glassy carbon electrode exhibit catalytic activity in the oxidation of caffeine. In this case, a more pronounced catalytic effect is obtained on an electrode modified with a composite based on a film of a perfluorinated sulfopolymer (Nafion) and mixed-valence iridium oxides. A selective voltammetric method for the determination of caffeine is developed. A linear logarithmic dependence of current on the caffeine concentration is observed in the range from 1 × 10^–8 to 5 × 10^–3 M. The developed method was used to determine caffeine in energy drinks.

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使用纳菲离子薄膜和混合价氧化铱修饰的电极以伏安法测定能量饮料中的咖啡因

摘要研究发现，电沉积在玻璃碳电极表面的混合价铱氧化物在咖啡因的氧化过程中表现出催化活性。在这种情况下，用基于全氟含硫聚合物（Nafion）薄膜和混合价铱氧化物的复合材料修饰的电极具有更明显的催化作用。开发了一种测定咖啡因的选择性伏安法。在 1 × 10-8 至 5 × 10-3 M 的范围内，电流与咖啡因浓度呈线性对数关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Analytical Chemistry 化学-分析化学

CiteScore

2.10

自引率

9.10%

发文量

146

审稿时长

13 months

期刊介绍： The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.