Abstract
A voltammetric study of the electrochemical behavior of red food azo dye Carmoisine on a glassy carbon electrode (GCE) is performed. The influence of various factors on the cathode signal of the dye is shown: pH and values of accumulation time and potential sweep rate. The operating conditions of Carmoisine identification in model media are selected: pH = 1.65, Eacc = –0.1 V, tacc = 10 s, W = 100 mV/s. A linear dependence of the electrolytic reduction current of the dye on its concentration at –0.15 V is observed within 0.05–0.5 mg/L; detection limit of Carmoisine is 0.02 mg/L. A comparative determination of Carmoisine in soft drinks is performed by voltammetric and spectrophotometric methods.
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Original Russian Text © O.I. Lipskikh, E.I. Korotkova, E.V. Dorozhko, K.V. Derina, O.A. Voronova, 2016, published in Zavodskaya Laboratoriya, Diagnostika Materialov, 2016, Vol. 82, No. 6, pp. 22–26.
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Lipskikh, O.I., Korotkova, E.I., Dorozhko, E.V. et al. Voltammetric Determination of Carmoisine in Soft Drinks. Inorg Mater 53, 1427–1431 (2017). https://doi.org/10.1134/S0020168517140114
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DOI: https://doi.org/10.1134/S0020168517140114