期刊
ANALYTICAL LETTERS
卷 44, 期 7, 页码 1358-1370出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00032719.2010.511743
关键词
Coating; Metolachlor; Molecularly imprinted polymer; Solid-phase microextraction; Stainless steel fiber
资金
- National Natural Science Foundation of China [20905026]
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 mu m (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.
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