Electrochemical determination of Tartrazine in food samples using nanostructure voltammetric sensor

Tartrazine is a usual lemon yellow azo dye and commonly suggested in food coloring [1]. As a synthetic azo dye, high level of tartrazine could be dangerous for human health. Therefore, determination of tartrazine is very important. In this study, we fabricated a carbon paste electrode modified with reduced graphene/CuO nanocomposite and ionic liquid and used room temperature ionic liquid as voltammetric sensor for determination of tartrazine. The fabricated sensor improved the oxidation current of tartrazine and reduced the oxidation of over-potential. The suggested sensor showed a detection limit 5 nM for tartrazine using square wave voltammetric method. Finally, the fabricated sensor was used for determination of tartrazine in food samples.