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Computer-aided design of magnetic dummy molecularly imprinted polymers for solid-phase extraction of ten phthalates from food prior to their determination by GC-MS/MS
Microchimica Acta ( IF 5.7 ) Pub Date : 2018-07-12 , DOI: 10.1007/s00604-018-2892-5
Chunxia Lu , Zonggui Tang , XiaoXu Gao , Xiaomei Ma , Changbin Liu

AbstractMagnetic dummy molecularly imprinted polymers (MDMIPs) were prepared by combining the surface imprinting technique with computer simulation for selective recognition of phthalate esters (PAEs). A computational study based on the density functional theory was performed to evaluate the template–monomer geometry and interaction energy in the prepolymerization mixture. The MDMIPs were characterized by transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, X-ray diffraction, and Fourier transform infrared spectroscopy. They exhibited (a) high saturation magnetization of 53.14 emu g−1 (leading to fast separation), and (b) large adsorption capacity, fast binding kinetics, and high selectivity for PAEs. Subsequently, a molecularly imprinted solid-phase extraction procedure followed by GC-MS was established for selective extraction and determination of 10 PAEs in food samples. Under the optimal experimental conditions, the response (peak area) was linear in the 0.5–100 ng mL−1 concentration range. The limits of detection ranged from 0.15 to 1.64 ng g−1. The method was applied to the determination of PAEs in spiked real samples. The recoveries for 10 PAEs from various foods were in the range of 73.7%–98.1%, with relative standard deviations of 1.7%–10.2%. Graphical abstractMagnetic dummy molecularly imprinted polymers (MDMIPs) were prepared and successfully were applied as a special sorbent for the selective recognition and fast enrichment of 10 PAEs from different complex matrix.

中文翻译:

磁性模拟分子印迹聚合物的计算机辅助设计,用于在 GC-MS/MS 测定之前固相萃取食品中的 10 种邻苯二甲酸酯

摘要 将表面印迹技术与计算机模拟相结合,制备了磁性假分子印迹聚合物(MDMIPs),用于邻苯二甲酸酯(PAEs)的选择性识别。进行了基于密度泛函理论的计算研究,以评估预聚合混合物中的模板-单体几何形状和相互作用能。MDMIPs 通过透射电子显微镜、扫描电子显微镜、振动样品磁强计、X 射线衍射和傅里叶变换红外光谱进行表征。它们表现出 (a) 53.14 emu g-1 的高饱和磁化强度(导致快速分离),以及 (b) 大吸附容量、快速结合动力学和对 PAE 的高选择性。随后,建立了分子印迹固相萃取程序,然后是 GC-MS,用于选择性萃取和测定食品样品中的 10 种 PAE。在最佳实验条件下,响应(峰面积)在 0.5–100 ng mL-1 浓度范围内呈线性。检测限范围为 0.15 至 1.64 ng g-1。该方法用于测定加标实际样品中的 PAE。各种食品中 10 种 PAE 的回收率范围为 73.7%–98.1%,相对标准偏差为 1.7%–10.2%。图形摘要制备了磁性假分子印迹聚合物(MDMIPs),并成功地作为一种特殊吸附剂用于选择性识别和快速富集来自不同复杂基质的10种PAEs。在最佳实验条件下,响应(峰面积)在 0.5–100 ng mL-1 浓度范围内呈线性。检测限范围为 0.15 至 1.64 ng g-1。该方法用于测定加标实际样品中的 PAE。各种食品中 10 种 PAE 的回收率范围为 73.7%–98.1%,相对标准偏差为 1.7%–10.2%。图形摘要制备了磁性假分子印迹聚合物(MDMIPs),并成功地作为一种特殊的吸附剂用于选择性识别和快速富集来自不同复杂基质的10种PAEs。在最佳实验条件下,响应(峰面积)在 0.5–100 ng mL-1 浓度范围内呈线性。检测限范围为 0.15 至 1.64 ng g-1。该方法用于测定加标实际样品中的 PAE。各种食品中 10 种 PAE 的回收率范围为 73.7%–98.1%,相对标准偏差为 1.7%–10.2%。图形摘要制备了磁性假分子印迹聚合物(MDMIPs),并成功地作为一种特殊的吸附剂用于选择性识别和快速富集来自不同复杂基质的10种PAEs。各种食品中 10 种 PAE 的回收率范围为 73.7%–98.1%,相对标准偏差为 1.7%–10.2%。图形摘要制备了磁性假分子印迹聚合物(MDMIPs),并成功地作为一种特殊的吸附剂用于选择性识别和快速富集来自不同复杂基质的10种PAEs。各种食品中 10 种 PAE 的回收率范围为 73.7%–98.1%,相对标准偏差为 1.7%–10.2%。图形摘要制备了磁性假分子印迹聚合物(MDMIPs),并成功地作为一种特殊的吸附剂用于选择性识别和快速富集来自不同复杂基质的10种PAEs。
更新日期:2018-07-12
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