期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1114, 期 2, 页码 255-262出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2006.02.051
关键词
molecularly imprinted solid-phase extraction; semi-covalent imprinted polymer; triazines; soil samples; vegetable samples
A semi-covalent imprinted polymer was prepared by precipitation polymerisation using propazine methacrylate as template molecule, ethylene glycol dimethacrylate as cross-linker and toluene as porogen. After removal of propazine by basic hydrolysis of the covalent bond, the optimum loading, washing and elution conditions for the solid-phase extraction of the selected triazines were established. The binding sites present in the polymeric matrix were characterised by fitting the experimental results of several rebinding studies to the Langmuir-Freundlich isotherm. Subsequently, an analytical methodology based on molecularly imprinted solid-phase extraction (MISPE) was developed for the determination of several triazinic herbicides in soil and vegetable samples. Following this procedure, a good degree of clean-up of the sample extracts was easily achieved, allowing the HPLC-UV determination of selected triazines in complex samples at low concentration levels. (c) 2006 Elsevier B.V. All rights reserved.
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