Flow-Injection Amperometric Determination of DOPA and Tyrosine at a Dual Electrode Modified with the Gold–Cobalt Binary System
- Authors: Shaidarova L.G.1, Chelnokova I.A.1, Leksina Y.A.1, Il’ina M.A.1, Gedmina A.V.1, Budnikov H.C.1
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Affiliations:
- Butlerov Institute of Chemistry
- Issue: Vol 73, No 2 (2018)
- Pages: 176-182
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182972
- DOI: https://doi.org/10.1134/S1061934818020119
- ID: 182972
Cite item
Abstract
The gold–cobalt binary system, electrodeposited on the surface of a screen-printed electrode, exhibits catalytic activity in the electrooxidation of DOPA and tyrosine. The catalytic effect is shown in a multiple increase in current compared with the oxidation current of the modifier and a decrease in the oxidation overvoltage of organic compounds. Methods for the flow-injection amperometric determination of DOPA and tyrosine at the proposed modified electrode are developed. The simultaneous amperometric determination of DOPA and tyrosine at a dual screen-printed electrode modified with an Au–Co binary system the under conditions of flow-injection analysis is demonstrated. The linear dependence of the analytical signal on the concentration of DOPA and tyrosine is observed in the ranges from 1 × 10–9 to 1 × 10–4 M and from 5 × 10–8 to 5 × 10–4 M, respectively.
About the authors
L. G. Shaidarova
Butlerov Institute of Chemistry
Author for correspondence.
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
I. A. Chelnokova
Butlerov Institute of Chemistry
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
Yu. A. Leksina
Butlerov Institute of Chemistry
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
M. A. Il’ina
Butlerov Institute of Chemistry
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
A. V. Gedmina
Butlerov Institute of Chemistry
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
H. C. Budnikov
Butlerov Institute of Chemistry
Email: larisashaidarova@mail.ru
Russian Federation, Kazan, 420008
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