Determination of Methionine in Medicines by Stripping Voltammetry

被引：9
|
作者：
Shelkovnikov, V. V. [1 ]
Altyev, A. M. [1 ]
Vinogradov, M. E. [1 ]
机构：
[1] Natl Res Tomsk State Univ, Chem Fac, Tomsk 634050, Russia
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2019年 / 74卷 / 12期
关键词：
stripping voltammetry; methionine; vitamin B-12; carbon nanotubes; modified electrode; OXIDATION;
D O I：
10.1134/S1061934819120116
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A method is proposed for the determination of methionine by stripping voltammetry on a carbon-containing electrode modified by vitamin B-12. The procedure is based on the reaction of methionine reduction to homocysteine. The preparation of the electrode consists in the formation of a vitamin B-12 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 x 10(-7) M.
引用
收藏
页码：1239 / 1244
页数：6
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