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Reference type: Journal
Authors: Hu XG, Dai GM, Huang JJ, Ye TT, Fan HJ, Youwen T, Yu Y, Liang Y
Article Title: Molecularly imprinted polymer coated on stainless steel fiber for solid-phase microextraction of chloroacetanilide herbicides in soybean and corn.
Publication date: 2010
Journal: Journal of Chromatography A
Volume: 1217
Issue: (38)
Page numbers: 5875-5882.
DOI: 10.1016/j.chroma.2010.07.011
Alternative URL: http://www.sciencedirect.com/science/article/B6TG8-50J4MF9-3/2/4168c8b2b992c7d3721d556692255309

Abstract: A molecularly imprinted polymer (MIP) with metolachlor as template was firstly coated on stainless steel fiber through chemical bonding strategy to solve the fragility problem of silica fiber substrate for solid-phase microextraction. The surface pretreatment of stainless steel fiber and the polymerization conditions were investigated systematically to enhance the preparation feasibility and MIP coating performance, and then a porous and highly cross-linked MIP coating with 14.8-μm thickness was obtained with over 200 times re-usability which was supported by non-fragile stainless steel fiber adoption. The MIP coating possessed specific selectivities to metolachlor, its metabolites and other chloroacetanilide herbicides with the factors of 1.1-4.6. Good extraction capacities of metolachlor, propisochlor and butachlor were found with MIP coating under quick adsorption and desorption kinetics, and the detection limits of 3.0, 9.6 and 38 μgáL-1 were achieved, respectively. Moreover, the MIP-coated stainless steel fiber was evaluated for trace metolachlor, propisochlor and butachlor extraction in the spiked soybean and corn samples, and the enrichment factors of 54-60, 27-31 and 15-20 were obtained, respectively
Template and target information: metolachlor, chloroacetanilide herbicides, propisochlor, butachlor
Author keywords: Stainless steel fiber, molecularly imprinted polymer, solid-phase microextraction, Metolachlor

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