Preparation and Characterization of Metolachlor Molecularly Imprinted Polymer Coating on Stainless Steel Fibers for Solid-Phase Microextraction
Preparation and Characterization of Metolachlor Molecularly Imprinted Polymer Coating on Stainless Steel Fibers for Solid-Phase Microextraction
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DOI：
10.1080/00032719.2010.511743
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发表时间：
2011-05
影响因子：
2
通讯作者：
Xiaogang Hu;Guimei Dai;Jiajing Huang;Hui-Jun Jin;Ying Yu;Yong Liang
中科院分区：
文献类型：
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作者：
Xiaogang Hu;Guimei Dai;Jiajing Huang;Hui-Jun Jin;Ying Yu;Yong Liang
以异丙甲草胺为模板分子，通过化学键合将分子印迹聚合物（MIP）涂覆在不锈钢纤维表面。尽管重复了12次涂层程序，但仍获得了厚度为17.4 µm（RSD为6.1%）的均匀、多孔和高度交联的MIP涂层。MIP涂层对异丙甲草胺和3种代谢物的特定选择性可以得出结论，异丙甲草胺、羟异丙甲草胺、去氯异丙甲草胺和去甲异丙甲草胺的萃取量分别是NIP涂层的4.4、4.1、3.9和2.9倍，并且发现MIP涂层的SPME不锈钢纤维对氯乙酰苯胺类除草剂具有良好的萃取能力。将该纤维用于玉米和大豆样品中异丙甲草胺、异丙甲草胺和丁草胺的提取，回收率分别为90.7- 92.6%、86.4- 87.9%和85.4-87.5%。
A molecularly imprinted polymer (MIP) with metolachlor as the template molecule was first coated on the surface of stainless steel fibers through chemical bonding. Despite 12 times repeated coating procedures, a homogenous, porous, and highly cross-linked MIP coating was obtained with thickness of 17.4 µm (RSD of 6.1%). The specific selectivity of MIP coating to metolachlor and three metabolites could be concluded with 4.4, 4.1, 3.9, and 2.9 times higher extraction amounts of metolachlor, hydroxymetolachlor, deschlorometolachlor, and desmethylmetolachlor than that of the NIP coating, respectively, and good extraction capabilities for chloroacetanilide herbicides were found with the MIP-coated SPME stainless steel fiber. For validation, the fiber was applied for the extraction of metolachlor, propisochlor, and butachlor in spiked corn and soybean samples, and the recoveries of 90.7–92.6%, 86.4–87.9, and 85.4–87.5% were obtained, respectively.