Fast Electrochemical Determination of Imidacloprid at an Activated Glassy Carbon Electrode

A fast and sensitive method for the determination of Imidacloprid (IMI) based on a simply pretreated glassy carbon electrode (GCE) has been developed. The easy activation at 2.0 V for only 30s of GCE leads to obvious catalytic property to IMI. The electrocatalytic properties and the electron-transfer kinetics of the activated GCE were investigated by cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy. The reduction mechanism of IMI was put forward and the limit of detection (LoD) was estimated to be about 0.61 μM.