عنوان مقاله [English]
Nowadays, owing to the increasing application of pesticides and their negative effects on human and other creatures accurate analytical methods are necessary. The aim of this work was a modification of glassy carbon electrode composition based on imprinted polymer and applying it as a sensor for the determination of Diazinon (DZN) in real and experimental samples. A novel composite of magnetic graphene oxide, gold nanoparticles, molecular imprinted polymers (MGO@AuNPs-MIPs) was synthesized and applied as a DZN electrochemical sensor. After synthesis of graphene and MGO@AuNPs, the template molecule (DZN) was first adsorbed at the surface of MGO@AuNPs, then the total composition was synthesized by polymerization of methyl methacrylate, ethylene glycol dimethyl acrylate and azodiisobutyronitrile as the functional monomer, the cross-linking agent and initiator of the imprinting polymerization, respectively. Then, the obtained composite was washed to remove the DZN. In order to identify synthesized compounds, XRD, FT-IR, and SEM techniques have been used. Square wave voltammetry was used for electrochemical measurements. The lowest detectable concentration (LOD) and the lowest quantitative concentration (LOQ) of MGO@AuNPs-MIPs were 8.72 х 10-9 and 2.63 х 10-8 molL-1, respectively.