Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
Anal Chim Acta. 2021 Nov 22;1186:339128. doi: 10.1016/j.aca.2021.339128. Epub 2021 Sep 30.
A magnetic dual-template molecularly imprinted polymer (DMIP) was successfully prepared in an aqueous medium and used as a sorbent for the selective extraction of organophosphorus pesticides prior to analysis by high-performance liquid chromatography (HPLC). The binding properties and selectivity of DMIP toward organophosphorus were evaluated and compared with those of a non-imprinted polymer. The established magnetic dispersive solid-phase extraction (MDSPE) method using DMIP exhibited fast enrichment of the target analytes within 60 s for adsorption and 30 s for desorption. Good linearities in the range of 0.5-2000 μg L with coefficients of determination (R) greater than 0.9930 were observed. The method provides low limits of detection of 0.062-0.195 μg L and limits of quantification of 0.210-0.640 μg L with relative standard deviations of less than 9.5% for intra- and inter-day analyses. The enrichment factors ranged from 464 to 621. Satisfactory recoveries ranged from 81.3 to 110.0% with relative standard deviations below 11%.
一种磁性双重模板分子印迹聚合物（DMIP）在水相中成功制备，并用作高效液相色谱（HPLC）分析前有机磷农药的选择性萃取剂。评估了 DMIP 对有机磷的结合性能和选择性，并与非印迹聚合物进行了比较。使用 DMIP 建立的磁性分散固相萃取（MDSPE）方法，用于吸附的目标分析物在 60 秒内快速富集，用于解吸的目标分析物在 30 秒内快速富集。在 0.5-2000μg/L 的范围内观察到良好的线性，相关系数（R）大于 0.9930。该方法的检出限低至 0.062-0.195μg/L，定量限低至 0.210-0.640μg/L，日内和日间分析的相对标准偏差均小于 9.5%。富集因子范围为 464 至 621。回收率在 81.3%至 110.0%之间，相对标准偏差低于 11%。
