Abstract
A procedure was suggested for voltammetric determination of streptomycin from the catalytic current on a glassy carbon electrode with a composite based on reduced graphene oxide and gold–nickel binary system. The working conditions of the electrode modification (volume of the graphene oxide and chitosan suspension, duration of the electrolytic reduction of immobilized graphene oxide and electrodeposition of the gold–nickel binary system) and the conditions for recording the catalytic current in the flow injection system were determined. The procedure for streptomycin determination in a flow, compared to the determination under stationary conditions, is more sensitive, reproducible, and rapid. The streptomycin detection limit was 0.45 nmol, and the productive capacity of the analysis was 60 samples per hour. The streptomycin determination procedure passed trials in analysis of cow milk.
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The study was financially supported by the Program of Strategic Academic Leadership of the Kazan (Volga Region) Federal University.
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L.G. Shaidarova and G.K. Budnikov: formulation of the goals of the study, choice of investigation objects, development of the measurement procedure; A.A. Pozdnyak and A.V. Gedmina: choice of optimum conditions for immobilization of the Au–Ni–reduced graphene oxide composite, study of the electrocatalytic activity of this composite in streptomycin oxidation, determination of the working conditions for recording the maximal catalytic effect; L.G. Shaidarova, A.A. Pozdnyak, and A.V. Gedmina: interpretation of the results of voltammetric studies; D.A. Murdasova and I.A. Chelnokova: determination of the working conditions for amperometric detection of streptomycin on an Au–Ni–reduced graphene oxide electrode in a flow injection system, interpretation of the results of the flow injection amperometric determination of streptomycin.
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Translated from Zhurnal Prikladnoi Khimii, No. 1, pp. 34–42, August, 2023 https://doi.org/10.31857/S004446182301005X
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Shaidarova, L.G., Pozdnyak, A.A., Gedmina, A.V. et al. Electrochemical Determination of Streptomycin on an Electrode Modified with a Composite of Graphene Oxide and Gold–Nickel Binary System. Russ J Appl Chem 96, 27–34 (2023). https://doi.org/10.1134/S1070427223010056
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DOI: https://doi.org/10.1134/S1070427223010056