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Selective extraction of triazine herbicides based on a combination of membrane assisted solvent extraction and molecularly imprinted solid phase extraction

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Author

Summary, in English

A selective extraction technique based on the combination of membrane assisted solvent extraction and molecularly imprinted solid phase extraction for triazine herbicides in food samples was developed. Simazine, atrazine, prometon, terbumeton, terbuthylazine and prometryn were extracted from aqueous food samples into a hydrophobic polypropylene membrane bag containing 1000 mu L of toluene as the acceptor phase along with 100 mg of MIP particles. In the acceptor phase, the compounds were re-extracted onto MIP particles. The extraction technique was optimised for the type of organic acceptor solvent, amount of molecularly imprinted polymers particles in the organic acceptor phase, extraction time and addition of salt. Toluene as the acceptor phase was found to give higher triazine binding onto MIP particles compared to hexane and cyclohexane. Extraction time of 120 min and 100 mg of MIP were found to be optimum parameters. Addition of salt increased the extraction efficiency for more polar triazines. The selectivity of the technique was demonstrated by extracting spiked cow pea and corn extracts where clean chromatograms were obtained compared to only membrane assisted solvent extraction or only molecularly imprinted solid phase extraction. The study revealed that this combination may be a simple way of selectively extracting compounds in complex samples. (C) 2010 Elsevier B.V. All rights reserved.

Publishing year

2011

Language

English

Pages

647-653

Publication/Series

Journal of Chromatography A

Volume

1218

Issue

5

Document type

Journal article

Publisher

Elsevier

Topic

  • Analytical Chemistry

Keywords

  • Selective extraction
  • Combination of techniques
  • Membrane assisted
  • solvent extraction
  • Molecular imprinted polymers
  • Triazines

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-9673