Journal
ANALYTICA CHIMICA ACTA
Volume 650, Issue 2, Pages 195-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2009.07.043
Keywords
Molecularly imprinted polymer; Bisphenol-A; Phenols; Phenoxyacids; Molecularly imprinted solid phase extraction; Honey
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Funding
- Ministerio de Ciencia e Innovacion, Spain [CTQ 2008-02200/BQU]
- junta de Castilla y Leon [SA017A08]
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An extraction-preconcentration procedure based on the use of a molecularly imprinted polymer (MIP) as selective sorbent has been developed for the determination of several phenolic Compounds (bisphenol-A, bisphenol-F and 4-nitrophenol) and phenoxyacid herbicides (2,4-D, 2,4,5-T and 2,4,5-TP) in honey samples. Liquid chromatography with diode array detection (LC-DAD) and electrospray ionisation-ion trap mass spectrometry (LC-IT-MS) were used for the separation, identification and quantification of these analytes. The molecularly imprinted polymer was obtained by precipitation polymerisation with bisphenol-A (BPA) as template and 4-vinylpyridine as the functional monomer. The behaviour of this sorbent was compared with those of other materials frequently used in SPE. The selectivity of the BPA-MIP for the target analytes was tested in samples containing other pesticides in common Use. The recoveries achieved for all six compounds were in the 81-96% range. By applying the proposed procedure prior to LC-IT-MS, the limits of detection achieved in commercial honey samples were in the 0.1-3.8 ng g(-1) range, with relative standard deviations of 12-24%. (C) 2009 Elsevier B.V. All rights reserved.
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