Simultaneous voltammetric determination of Brilliant Blue FCF and Tartrazine for food quality control

Olga I Lipskikh; Elena I Korotkova; Jiri Barek; Vlastimil Vyskocil; Muhammad Saqib; Ekaterina P Khristunova

doi:10.1016/j.talanta.2020.121136

Simultaneous voltammetric determination of Brilliant Blue FCF and Tartrazine for food quality control

Talanta. 2020 Oct 1:218:121136. doi: 10.1016/j.talanta.2020.121136. Epub 2020 May 11.

Authors

Olga I Lipskikh¹, Elena I Korotkova¹, Jiri Barek², Vlastimil Vyskocil³, Muhammad Saqib⁴, Ekaterina P Khristunova⁵

Affiliations

¹ National Research Tomsk Polytechnic University, School of Earth Sciences and Engineering, Department of Chemical Engineering, Lenin Avenue 30, Tomsk, 634050, Russia.
² National Research Tomsk Polytechnic University, School of Earth Sciences and Engineering, Department of Chemical Engineering, Lenin Avenue 30, Tomsk, 634050, Russia; Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Hlavova 8, 128 43, Prague 2, Czech Republic. Electronic address: barek@natur.cuni.cz.
³ Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Hlavova 8, 128 43, Prague 2, Czech Republic.
⁴ National Research Tomsk Polytechnic University, School of Energy and Power Engineering, Department of Power and Electrical Engineering, Lenin Avenue 30, Tomsk, 634050, Russia.
⁵ National Research Tomsk Polytechnic University, School of Earth Sciences and Engineering, Department of Chemical Engineering, Lenin Avenue 30, Tomsk, 634050, Russia; Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Hlavova 8, 128 43, Prague 2, Czech Republic; University of Chemistry and Technology, Prague, Faculty of Chemical Technology, Department of Solid State Chemistry, Technicka 5, 166 28, Prague 6, Czech Republic.

PMID: 32797893
DOI: 10.1016/j.talanta.2020.121136

Abstract

Voltammetric determination of Tartrazine (Tz) and Brilliant Blue FCF (BB) in their mixture using novel type of carbon black-polyethylene composite electrode (CBPCE) with renewable surface modified by carbon ink (CI) was developed. Electrochemical properties of the tested dyes were investigated in 0.1 mol L^-1 Britton-Robinson (BR) buffer by cyclic voltammetry (CV) and linear scan voltammetry (LSV). Simultaneous determination of the dyes is based on the application of supporting electrolytes with different pH: 2.0 for Tz and 10.0 for BB. Under the optimum experimental conditions, linear concentration dependences in the concentration ranges from 0.037 to 1.38 μmol L^-1 for Tz and from 0.025 to 2.52 μmol L^-1 for BB were obtained by LSV in the first-order derivative mode. Limits of detection (LODs) for Tz and BB were 0.019 and 0.011 μmol L^-1, respectively. The modified electrode showed good stability and reproducibility and was successfully applied for the determination of the mixture Tz and BB in a candy and soft drink products.

Keywords: Brilliant blue FCF; Linear scan voltammetry; Modified electrode; Tartrazine.