Shandong Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China.
College of Food Science and Engineering, Shandong Agricultural University, Taian 270018, China.
Talanta. 2017 Aug 1;170:111-118. doi: 10.1016/j.talanta.2017.04.005. Epub 2017 Apr 4.
In this study, a novel amphiphilic magnetic molecularly imprinted polymers (MMIPs) have been prepared by using FeO microspheres as the magnetic core, 4-vinyl pyridine (4-VP) and alkenyl glycosides glucose (AGG) as functional co-monomers. FeO microspheres were directly encapsulated by the polymer without any surface modification in the distillation-precipitation polymerization. The morphology and composition of MMIPs were characterized by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Binding property and magnetic separation ability were systematically investigated through the equilibrium binding experiments. The feasibility of magnetic molecular imprinted solid phase extraction (MMISPE) was investigated for the selective enrichment of chloroacetamide herbicides from environmental water samples. The developed MMISPE-HPLC method exhibited good linearity (0.1-200μgL), low limit of detection (0.03-0.06μgL), and good precision (RSD<7%) under the optimized conditions. The introduced MMISPE-HPLC method was successfully used to analyze chloroacetamide herbicides in environmental water samples. Spiked chloroacetamide herbicides recoveries in three water samples ranged from 82.1% to 102.9%. These results indicated that amphiphilic MMIPs were the promising sorbents for the selective enrichment of chloroacetamide herbicides at trace levels from real environmental water samples.
在这项研究中，制备了一种新型的两亲性磁性分子印迹聚合物（MMIPs），以 FeO 微球为磁性核，4-乙烯基吡啶（4-VP）和烯基糖苷葡萄糖（AGG）为功能共聚单体。在蒸馏沉淀聚合中，聚合物直接包裹 FeO 微球，无需任何表面修饰。通过 X 射线衍射（XRD）、振动样品磁强计（VSM）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对 MMIPs 的形貌和组成进行了表征。通过平衡结合实验系统地研究了结合性能和磁分离能力。通过磁性分子印迹固相萃取（MMISPE）研究了从环境水样中选择性富集氯乙酰胺除草剂的可行性。在优化条件下，所开发的 MMISPE-HPLC 方法表现出良好的线性（0.1-200μgL）、低检测限（0.03-0.06μgL）和良好的精密度（RSD<7%）。所引入的 MMISPE-HPLC 方法成功地用于分析环境水样中的氯乙酰胺除草剂。在三个水样中，添加的氯乙酰胺除草剂的回收率在 82.1%至 102.9%之间。这些结果表明，两亲性 MMIPs 是从实际环境水样中痕量选择性富集氯乙酰胺除草剂的有前途的吸附剂。
