应用热引发的方法研制了苯醚菊酯的分子印迹电化学传感器,用循环伏安法对影响该传感器制备的因素进行了优化,并对其性能进行了评价.实验表明:该传感器具有比较高的灵敏度和选择性,响应电流与苯醚菊酯的浓度在1.0~100.0 μmol/L成良好的线性关系,线性系数R为0.992 8,检出限为2.0×10-7 mol/L.将其应用于湘江水中苯醚菊酯的检测,回收率在95.62%~103.19%之间.
Phenothrin is an important insecticidal and acaricidal agent with certain toxicity.It is highly necessary to develop a rapid,sensitive and selective method for phenothrin assay.This article demonstrated a thermal initiation method to prepare molecularly imprinted electrochemical sensor,which selects phenothrin as the imprinted molecule.Some factors affecting the preparation of the molecularly imprinted electrochemical sensor were optimized and its sensing performance was evaluated.The sensor exhibits a high sensitivity and selectivity towards phenothrin.The response current depends on the concentration of phenothrin at the range of 1.0 ~100.0 μmol/L,and the detection limit is 2.0 × 10-7 mol/L.The sensor has been applied to the analysis of phenothrin in the water of Xiangjiang River with a satisfactory recovery rates ranging from 95.62% to 103.19%.