Semi-covalent imprinted polymer using propazine methacrylate as template molecule for the clean-up of triazines in soil and vegetable samples
Semi-covalent imprinted polymer using propazine methacrylate as template molecule for the clean-up of triazines in soil and vegetable samples
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DOI：
10.1016/j.chroma.2006.02.051
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发表时间：
2006-05-12
影响因子：
4.1
通讯作者：
Perez-Conde, C.
中科院分区：
文献类型：
--
作者：
Cacho, C.;Turiel, E.;Perez-Conde, C.
以甲基丙烯酸丙嗪为模板分子、二甲基丙烯酸乙二醇酯为交联剂、甲苯为致孔剂，通过沉淀聚合制备了半共价印迹聚合物。通过共价键的碱性水解去除丙嗪后，建立了所选三嗪固相萃取的最佳加载、洗涤和洗脱条件。通过将多项再结合研究的实验结果拟合到 Langmuir-Freundlich 等温线来表征聚合物基质中存在的结合位点。随后，开发了一种基于分子印迹固相萃取（MISPE）的分析方法，用于测定土壤和蔬菜样品中的几种三嗪类除草剂。遵循此程序，可以轻松实现样品提取物的良好净化程度，从而可以对复杂样品中低浓度水平的选定三嗪进行 HPLC-UV 测定。 (c) 2006 Elsevier B.V. 保留所有权利。
A semi-covalent imprinted polymer was prepared by precipitation polymerisation using propazine methacrylate as template molecule, ethylene glycol dimethacrylate as cross-linker and toluene as porogen. After removal of propazine by basic hydrolysis of the covalent bond, the optimum loading, washing and elution conditions for the solid-phase extraction of the selected triazines were established. The binding sites present in the polymeric matrix were characterised by fitting the experimental results of several rebinding studies to the Langmuir-Freundlich isotherm. Subsequently, an analytical methodology based on molecularly imprinted solid-phase extraction (MISPE) was developed for the determination of several triazinic herbicides in soil and vegetable samples. Following this procedure, a good degree of clean-up of the sample extracts was easily achieved, allowing the HPLC-UV determination of selected triazines in complex samples at low concentration levels. (c) 2006 Elsevier B.V. All rights reserved.