Determination of Methionine in Medicines by Stripping Voltammetry
- Authors: Shelkovnikov V.V.1, Altyev A.M.1, Vinogradov M.E.1
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Affiliations:
- Chemical Faculty, National Research Tomsk State University
- Issue: Vol 74, No 12 (2019)
- Pages: 1239-1244
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183356
- DOI: https://doi.org/10.1134/S1061934819120116
- ID: 183356
Cite item
Abstract
A method is proposed for the determination of methionine by stripping voltammetry on a carbon-containing electrode modified by vitamin B12. The procedure is based on the reaction of methionine reduction to homocysteine. The preparation of the electrode consists in the formation of a vitamin B12 film on the surface of a carbon-containing electrode modified with carbon nanotubes by cyclic voltammetry with a potential sweep from –1.4 to +1 V. The conditions of analysis are optimized: accumulation potential, accumulation time, and sweep rate. The limit of detection for methionine is 1 × 10–7 M.
About the authors
V. V. Shelkovnikov
Chemical Faculty, National Research Tomsk State University
Author for correspondence.
Email: shvv@chem.tsu.ru
Russian Federation, Tomsk, 634050
A. M. Altyev
Chemical Faculty, National Research Tomsk State University
Email: shvv@chem.tsu.ru
Russian Federation, Tomsk, 634050
M. E. Vinogradov
Chemical Faculty, National Research Tomsk State University
Email: shvv@chem.tsu.ru
Russian Federation, Tomsk, 634050