异丙隆分子印迹敏感膜传感器

Isoproturon Sensor Based on Molecularly Imprinted Electropolymer

在弱酸(pH5.5)条件下,采用电聚合法在金电极上制备邻氨基酚异丙隆分子印迹膜,对该印迹膜的性能、分子印迹效应和印迹膜对模板分子及其结构相似物的选择性响应等进行了研究。以K3Fe(CN)6为印迹电极和底液间的探针,建立了一种检测异丙隆的方法。该传感器对异丙隆具有良好的选择性和敏感度,异丙隆浓度在1.0×10-7～4.0×10-4mol/L范围内与K3Fe(CN)6还原峰电流减少量呈线性关系;检出限为2.95×10-8mol/L。对农田水中异丙隆含量进行了测定,回收率为99.0%～102.0%。

Under the condition of weak acidity （pH 5.5 ） , molecularly imprinted films （MIF） on gold electrode were prepared by electropolymerization method for the determination of isoproturon. The imprinting effect, performance and the selective response to the structurally similar compounds of isoproturon were studied. Potassium ferricyanide was worked as the probe between the electrode and base solution, and a method for determining isoproturon was established. The sensor shows high selectivity and sensitivity towards the target isoproturon and it gives a linear correlation to isoproturon concentration over a range from 1.0×10^-7～4.0×10^-4mol/L with a detection limit of 2.95 × 10^-8mol/L. The sensor has been applied to the analysis of isoproturon in farmland water samples with recovery ranging from 99.0% to 102.0%.