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以猛杀威为模板分子、丙烯酰胺(AM)为功能单体、马来松香丙烯酸乙二醇酯(EGMRA)为交联剂、自制的3D石墨烯(3D-rGO)为增敏材料,在玻碳电极表面合成分子印迹聚合物,制备检测猛杀威的分子印迹电化学传感器。运用扫描电镜(SEM)对自制3D石墨烯的形貌进行了表征,通过循环伏安法(CV)、差分脉冲伏安法(DPV)和交流阻抗法(EIS)对猛杀威传感器的性能进行了研究。结果表明,猛杀威的浓度在8.0×10~8~8.0×10~6mol/L范围内与响应电流值呈良好的线性关系,线性相关系数R=0.9954,检出限为7.3×10~8mol/L(S/N=3),猛杀威分子印迹敏感膜的印迹因子β=3.88,且相对于3种结构类似物的选择因子α?1,说明此传感器具有良好的选择性。将此传感器应用于生菜样品检测,加标回收率在96.7%~98.7%之间。
In this paper, the target compounds were prepared by using Megamachine as the template molecule, acrylamide (AM) as the functional monomer, maleic rosin ethylene glycol acrylate (EGMRA) as the crosslinking agent and 3D-rGO as the sensitizer Molecularly imprinted polymer was synthesized on the surface of glassy carbon electrode to prepare a molecularly imprinted electrochemical sensor for detection of malathion. The morphology of self-made 3D graphene was characterized by scanning electron microscopy (SEM). The properties of the fabricated 3D graphene were characterized by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and alternating current impedance spectroscopy (EIS) Study. The results showed that the concentration of fierce prestige had a good linear relationship with the response current in the range of 8.0 × 10-8 ~ 8.0 × 10-6 mol / L, the linear correlation coefficient was 0.9954, the detection limit was 7.3 × 10 ~ 8mol / L (S / N = 3). The imprinting factor β = 3.88 of the molecularly imprinted membrane was compared with that of the three structural analogues, indicating that the sensor has good selectivity. The sensor was applied to the detection of lettuce samples, the spiked recoveries ranged from 96.7% to 98.7%.