Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, PR China.
J Biomater Sci Polym Ed. 2020 May;31(7):954-968. doi: 10.1080/09205063.2020.1731788. Epub 2020 Mar 4.
Cyfluthrin is a widely used pesticide. In this study, a sensitive and efficient magnetic molecularly imprinted polymer (MMIP) was prepared by surface molecular imprinting, which used functionalized FeO particles as magnetic cores. Cyfluthrin was extracted and enriched using magnetic molecularly polymer for analyzing pesticide residue of Chinese herbal medicines. The crystal type, microstructure, particle size, saturation magnetization, and characteristic functional groups of the synthesized MMIPs were analyzed by analysis equipment. The results of isothermal adsorption and kinetic adsorption indicated that MMIPs reached adsorption equilibrium at 30 min, with a maximum capacity of 4.9 mg , which had good adsorption performance, while selective adsorption experiments showed that MMIPs had higher affinity for cyfluthrin. Under the optimized conditions, the limit of detection (LOD) and the limit of quantification (LOQ) were 32.987 ng ml and 109.955 ng ml, respectively. And linear range (30-3000ng ml) of cyfluthrin with correlation coefficient =0.9979, and MMIPs were used in honeysuckle, the recoveries were 91.5%∼97.2%, and RSD was 5.35%∼8.32% ( = 3). It is indicated that the magnetic molecularly imprinted polymer can be used as an effective material for the specific separation of cyfluthrin from honeysuckle.
氯氟氰菊酯是一种广泛使用的农药。本研究采用表面分子印迹技术，以功能化的 FeO 颗粒为磁性核，制备了一种灵敏高效的磁性分子印迹聚合物（MMIP）。采用磁性分子聚合物提取和富集中草药中的农药残留，分析其中的农药残留。通过分析设备对合成的 MMIPs 的晶型、微观结构、粒径、饱和磁化强度和特征官能团进行了分析。等温吸附和动力学吸附结果表明，MMIPs 在 30 min 达到吸附平衡，最大容量为 4.9 mg，具有良好的吸附性能，而选择性吸附实验表明 MMIPs 对氯氟氰菊酯具有更高的亲和力。在优化条件下，氯氟氰菊酯的检测限（LOD）和定量限（LOQ）分别为 32.987 ng ml 和 109.955 ng ml，线性范围为 30-3000 ng ml，相关系数 =0.9979。将 MMIPs 用于金银花中氯氟氰菊酯的检测，回收率为 91.5%-97.2%，RSD 为 5.35%-8.32%（n=3）。结果表明，磁性分子印迹聚合物可作为从金银花中特异性分离氯氟氰菊酯的有效材料。
