利用电化学方法把结晶紫聚合到石墨烯修饰电极上,制备了聚结晶紫-石墨烯修饰电极。研究了辛硫磷在此电极上的电化学行为,建立了测定辛硫磷残留的新方法。辛硫磷在聚结晶紫-石墨烯修饰电极上的还原峰电流与其浓度在8.0×10-8~2.0×10-5mol/L内呈良好线性关系,检出限为4.0×10-8mol/L。该方法用于实际样品分析。

Methyl violet was combined with graphene modified electrode by electrochemical method to prepare the poly( methyl violet)-graphene modified electrode. The electrochemical behavior of phoxim on the modified electrode was studied. The reduction peak current versus the concentration of phoxim showed a linear relation over the range of 8. 0 × 10- 8~ 2. 0 × 10- 5mol / L. The detection limit was 4. 0 × 10- 8mol / L. The method has been successfully applied for the determination of phoxim in real food with satisfactory results.