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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Article number121136
JournalTalanta
Volume218
DOIs
Publication statusPublished - 1 Oct 2020

Keywords

  • Brilliant blue FCF
  • Linear scan voltammetry
  • Modified electrode
  • Tartrazine

ASJC Scopus subject areas

  • Analytical Chemistry

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