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Flow-Injection Amperometric Determination of DOPA and Tyrosine at a Dual Electrode Modified with the Gold–Cobalt Binary System

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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.

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Authors and Affiliations

  1. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, 420008, Russia

    L. G. Shaidarova, I. A. Chelnokova, Yu. A. Leksina, M. A. Il’ina, A. V. Gedmina & H. C. Budnikov

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  1. L. G. Shaidarova
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  2. I. A. Chelnokova
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  3. Yu. A. Leksina
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  4. M. A. Il’ina
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  5. A. V. Gedmina
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  6. H. C. Budnikov
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Correspondence to L. G. Shaidarova.

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Original Russian Text © L.G. Shaidarova, I.A. Chelnokova, Yu.A. Leksina, M.A. Il’ina, A.V. Gedmina, H.C. Budnikov, 2018, published in Zhurnal Analiticheskoi Khimii, 2018, Vol. 73, No. 2, pp. 129–136.

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Shaidarova, L.G., Chelnokova, I.A., Leksina, Y.A. et al. Flow-Injection Amperometric Determination of DOPA and Tyrosine at a Dual Electrode Modified with the Gold–Cobalt Binary System. J Anal Chem 73, 176–182 (2018). https://doi.org/10.1134/S1061934818020119

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  • DOI: https://doi.org/10.1134/S1061934818020119

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