Kojic Acid Analysis in Foodstuff using a Reduced Graphene Oxide/NiO Nanocomposite Modified Electrode

An electrochemical amplified sensor based on carbon paste electrode modified with reduced graphene oxide/NiO nanocomposite (CPE/rGO/NiO-NC) was suggested for kojic acid determination in food samples. rGO/NiO-NC were characterized by SEM and EDAX methods. The CPE/rGO/NiO-NC showed highly catalytic activity to kojic acid electro-oxidation in aqueous solution. The oxidation currents of kojic acid increased linearly with kojic acid concentration by differential pulse voltammetric (DPV) method in the ranges of 0.3–700 μM with limit of detection ~0.09 μM. The ability of CPE/rGO/NiO-NC was check for the analysis of kojic acid in foodstuff.