Simultaneous detection of tartrazine-sunset yellow in food samples using bioxide/carbon paste microcomposite with lanthanum and titanium

Edgar Nagles, Mario Ceroni, John Hurtado

Research output: Contribution to journalArticlepeer-review

Abstract

This report describes the simultaneous detection of the two dyes most commonly used in food, tartrazine (TZ) and sunset yellow (SY), based on a microcomposite of carbon paste decorated with La2O3 and TiO2. Anodic currents for SY-TZ were observed at 0.89-1.21 V by cyclic voltammetry (CV) separated with a ΔV of 0.32 V. The increased anodic peak currents compared to that of the unmodified carbon paste electrode were almost 50 and 41% for SY-TZ, respectively. The detection limits with the optimal amount of La2O3-TiO2 were 0.02 and 0.03 µmol/L, respectively. The relative standard deviation (RSD) based on fifty measurements was less than 3%. The versatility and novelty of the sensor were tested with food samples containing these substances and other substances.

Original languageEnglish
Pages (from-to)421-429
Number of pages9
JournalJournal of Electrochemical Science and Technology
Volume11
Issue number4
DOIs
StatePublished - 2020

Bibliographical note

Funding Information:
E.N. and M.C appreciates the financial support provided by the Universidad Nacional Mayor de San Marcos (project C1907068118-541 and C20071301). Additionally, J.H. thanks the Universidad de los Andes, Science Faculty and the Chemistry Department.

Publisher Copyright:
© 2020, Korean Electrochemical Society. All rights reserved.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Carbon Paste
  • Lanthanum And Titanium Oxides
  • Sunset Yellow
  • Tartrazine

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