期刊
JOURNAL OF CHROMATOGRAPHY A
卷 938, 期 1-2, 页码 35-44出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(01)01126-8
关键词
molecular imprinting; solid-phase extraction; environmental analysis; water analysis; organochlorine compounds; pesticides; phenoxy acids
A molecularly imprinted polymer (MIP) was synthesized using the herbicide 2,4,5-trichlorophenoxyacetic acid as a template, 4-vinylpyridine as an interacting monomer, ethylendimethacrylate as a cross-linker and a methanol-water mixture as a porogen. The binding properties and the selectivity of the polymer towards the template were investigated by frontal and zonal liquid chromatography. The polymer was used as a solid-phase extraction material for the clean-up of the template molecule and some related herbicides (2,4-dichlorophenoxyacetic acid, fenoprop, dichlorprop) from river water samples at a concentration level of ng/ml with quantitative recoveries comparable with those obtained with a traditional C-18 reversed-phase column when analyzed by capillary electrophoresis. The results obtained show that the MIP-based approach to the solid-phase extraction is comparable with the more traditional solid-phase extraction with C-18, reversed-phase columns in terms of recovery, but it is superior in terms of sample clean-up. (C) 2001 Elsevier Science B.V. All rights reserved.
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