Voltammetric Determination of Carmoisine in Soft Drinks


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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.

作者简介

O. Lipskikh

Tomsk Polytechnic University

编辑信件的主要联系方式.
Email: lipskih-olga@yandex.ru
俄罗斯联邦, Tomsk, 634050

E. Korotkova

Tomsk Polytechnic University

Email: lipskih-olga@yandex.ru
俄罗斯联邦, Tomsk, 634050

E. Dorozhko

Tomsk Polytechnic University

Email: lipskih-olga@yandex.ru
俄罗斯联邦, Tomsk, 634050

K. Derina

Tomsk Polytechnic University

Email: lipskih-olga@yandex.ru
俄罗斯联邦, Tomsk, 634050

O. Voronova

Tomsk Polytechnic University

Email: lipskih-olga@yandex.ru
俄罗斯联邦, Tomsk, 634050

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