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Simultaneous Detection of Tartrazine-Sunset Yellow in Food Samples Using Bioxide/Carbon Paste Microcomposite with Lanthanum and Titanium

  • Nagles, Edgar (Facultad de Quimica e Ingenieria Quimica, Universidad Nacional Mayor de San Marcos) ;
  • Ceroni, Mario (Facultad de Quimica e Ingenieria Quimica, Universidad Nacional Mayor de San Marcos) ;
  • Hurtado, John (Departamento de Quimica, Universidad de los Andes)
  • Received : 2020.06.08
  • Accepted : 2020.08.11
  • Published : 2020.11.30

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.