Electrochemical analysis of carbaryl in fruit samples on graphene oxide-ionic liquid composite modified electrode

• Published in: Journal of food composition and analysis Vol. 40; pp. 14 - 18
• Main Authors: Liu, Benzhi, Xiao, Bo, Cui, Liqiang
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.06.2015
• Subjects: Carbaryl; Composite; Electrochemical analysis; Food analysis; Food composition; Food safety; Graphene oxide; Ionic liquid; Modified electrode; Electrochemical analysis; Carbaryl; Composite; Modified electrode; Graphene oxide; Food composition; Food safety; Food analysis; Ionic liquid
• ISSN: 0889-1575; 1096-0481
• DOI: 10.1016/j.jfca.2014.12.010

•Graphene oxide-ionic liquid composite modified electrode was fabricated.•The electrode shows obvious electrocatalytic activity to the oxidation of carbaryl.•Diffusion coefficient and standard heterogeneous rate constant were investigated.•The determination of carbaryl in fruit samples was performed. Graphene oxide-ionic liquid composite modified glassy carbon electrode was fabricated for the electrochemical oxidation and determination of carbaryl. The modified electrode exhibits an obvious electrocatalytic activity towards the oxidation of carbaryl. The electrochemical oxidation of carbaryl at modified electrode is a one-electron coupling with one-proton transfer process. The diffusion coefficient and standard heterogeneous rate constant are calculated to be 3.08×10−5 cm2s−1 and 5.71×10−3cms−1, respectively. For the determination of carbaryl, a linear scope of 0.10–12.0μM with a detection limit of 0.02μM was achieved. The proposed method was applied successfully for the determination of carbaryl in fruit samples, which provided a promising tool for food safety control.