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- Title
Voltammetric Determination of Caffeine in Energy Drinks Using an Electrode Modified with a Nafion Film and Mixed-Valence Iridium Oxides.
- Authors
Shaidarova, L. G.; Chelnokova, I. A.; Koryakovtseva, D. A.; Kirilenko, D. A.; Budnikov, H. C.
- 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.
- Subjects
ENERGY drinks; IRIDIUM oxide; CARBON electrodes; NAFION; CAFFEINE; CATALYSIS; OXIDES
- Publication
Journal of Analytical Chemistry, 2024, Vol 79, Issue 6, p721
- ISSN
1061-9348
- Publication type
Article
- DOI
10.1134/S1061934824700096