Synthesis and application of a novel molecularly imprinted polymer-coated stir bar for microextraction of triazole fungicides in soil.
Synthesis and application of a novel molecularly imprinted polymer-coated stir bar for microextraction of triazole fungicides in soil.
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DOI：
10.1002/jssc.201100068
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发表时间：
2011-05
影响因子：
3.1
通讯作者：
Yuling Hu;Jiawei Li;Gongke Li
中科院分区：
文献类型：
--
作者：
Yuling Hu;Jiawei Li;Gongke Li
介绍了以三唑酮为模板分子的分子印迹聚合物吸附搅拌棒的制备、性能及应用。采用化学键合法将MIP涂覆在玻璃毛细管上。该合成方法有效，重现性好，批间RSD在7.8%以内。搅拌棒的扫描电子显微镜照片显示了平均厚度为15 μm的高度多孔涂层。所合成的搅拌棒在大多数使用的溶剂中被证明是高度稳定的。萃取性能表明，所制备的搅拌棒对三唑酮及结构相关化合物如三唑醇、烯唑醇、粉唑醇、己唑醇、戊唑醇、多效唑和烯效唑等具有良好的分子识别能力，可用于复杂样品中三唑类杀菌剂的高效液相色谱同时测定。以10.0 μg/L的三唑类杀菌剂标准溶液为萃取剂，对影响萃取的因素进行了优化，建立了土壤中三唑类杀菌剂的分析方法。方法的检出限为0.14-0.34 μg/L，加标回收率为86.7%~ 114.6%。
The preparation, characteristics and application of a sorptive stir bar coated with molecularly imprinted polymer (MIP) using triadimefon as the template molecule are described here. Raw glass capillary was coated with MIP through chemical bonding. The synthesis method was effective and reproducible with the batch-to-batch RSD within 7.8%. Scanning electron micrographs of the stir bar revealed a highly porous coating with average thickness of 15 μm. The synthesized stir bar was proved to be highly stable in most of the solvent for use. Extraction performance showed the fabricated stir bar has excellent molecular recognition abilities for triadimefon and the structure-related compounds, such as triadimenol, diniconazole, flutriafol, hexaconazole, tebuconazole, paclobutrazol and uniconazole, and thus can be applied for simultaneous determination of these triazole fungicides from complex samples by coupling with high-performance liquid chromatography. The variables that influence extraction were optimized with 10.0 μg/L standard solutions of triazole fungicides, and the analytical method was established for the determination of triazole fungicides in soil. The detection limits were in the range of 0.14-0.34 μg/L, and the recoveries were from 86.7 to 114.6% for spiked soil sample.