Sensitive and Selective Detection of Imidacloprid by Graphene-Oxide-Modified Glassy Carbon Electrode

Based on the enhancement effect of graphene oxide (GO), a GO-modified glassy carbon electrode (GO/GCE) is prepared for the fast and sensitive electrochemical detection of the imidacloprid (IMI) insecticide, with high selectivity and stability, for the first time. The electrochemical behavior of imidacloprid on GO/GCE is investigated by using cyclic voltammetry, and graphene oxide is found to have a strong affinity towards IMI. The reduction peak current varies linearly with the concentration of IMI over the 0.8-10 mu m range and the limit of detection is 0.36 mu m.