Dual-template magnetic molecularly imprinted particles with multi-hollow structure for the detection of dicofol and chlorpyrifos-methyl
Dual-template magnetic molecularly imprinted particles with multi-hollow structure for the detection of dicofol and chlorpyrifos-methyl
复制标题
多空心结构双模板磁性分子印迹颗粒检测三氯杀螨醇和甲基毒死蜱
DOI：
10.1002/jssc.201600258
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发表时间：
2016
影响因子：
3.1
通讯作者：
Wang Jide
中科院分区：
文献类型：
--
作者：
Yang Tao;Feng Shun;Lu Yi;Yin Chao;Wang Jide
本工作通过水包油无乳化剂乳化技术制备了一种新型的三氯杀螨醇和甲基毒死蜱双模板磁性分子印迹聚合物粒子。用电子显微镜、傅里叶变换红外光谱和X射线衍射仪对所得磁性粒子进行了表征。结果表明，所制备的纳米粒子为形状良好的球形，具有多中空结构，大小约为125μm，同时具有良好的磁敏性能。结果表明，多空磁性分子印迹聚合物对目标分子具有良好的识别能力和快速的动力学结合行为。最大结合量分别为31.46 mg/g和25.23 mg/g。对该颗粒作为固相萃取吸附剂的可行性进行了评价。三种添加水平的三氯杀螨醇和甲基毒死蜱的加标回收率分别为90.62%~111.47%和91.07%~94.03%。Langmuir等温式对三氯杀螨醇和甲基毒死蜱的平衡吸附数据均有很好的拟合作用。这为双模板磁性分子印迹聚合物颗粒高选择性吸附农药提供了一种新的途径。
In this work, a novel dual‐template magnetic molecularly imprinted polymer particle for dicofol and chlorpyrifos‐methyl was prepared through oil‐in‐water emulsifier‐free emulsion technology. The resulting magnetic particles were characterized with electron microscopy, Fourier transform infrared spectroscopy, and X‐ray diffraction. It was found that as‐prepared particles were well‐shaped spheres with multi‐hollow structures and of a size around 125 μm. Meanwhile it showed a good magnetic sensitivity. The results testified that multi‐hollow magnetic molecularly imprinted polymers possessed excellent recognition capacity and fast kinetic binding behavior to the objective molecules. The maximum binding amounts toward dicofol and chlorpyrifos‐methyl were 31.46 and 25.23 mg/g, respectively. The feasibility of the use of the particles as a solid‐phase extraction sorbent was evaluated. Satisfactory recoveries ranging from 90.62 to 111.47 and 91.07 to 94.03% were obtained for dicofol and chlorpyrifos‐methyl, respectively, spiked at three concentration levels from real samples. The Langmuir isotherm equation provided an excellent fit to the equilibrium sorption data of either dicofol or chlorpyrifos‐methyl. It provided a novel way to advise dual‐template magnetic molecularly imprinted polymer particles to adsorb pesticides with high selectivity.