Abstract
An analytical method for determination and confirmation of nine coccidiostatics in eggs is reported. Ethyl acetate is used as extraction solvent, with satisfactory results, and simple automated clean-up is based on gel-permeation chromatography (GPC) . The target compounds are then analysed by liquid chromatography–electrospray ionization–tandem mass spectrometry. The method was validated in-house in accordance with Commission Decision 2002/657/EC. Trueness and precision were determined at four concentrations, and the mean errors obtained were <10 %, with relative standard deviations ranging from 3 to 18 %. For three non-authorized coccidiostatics (clopidol, ethopabate, and ronizadole), decision limit and detection capability were in the ranges 0.12–0.16 and 0.18–0.23 μg kg−1, respectively. The results obtained prove the suitability of this new analytical method for routine monitoring of these substances in eggs.
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Financial support from the Spanish Ministerio de Ciencia y Tecnología (CiCYT Project AGL2008-05578-C05-03) is gratefully acknowledged.
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Chico, J., Rúbies, A., Centrich, F. et al. Use of gel permeation chromatography for clean-up in the analysis of coccidiostats in eggs by liquid chromatography–tandem mass spectrometry. Anal Bioanal Chem 405, 4777–4786 (2013). https://doi.org/10.1007/s00216-013-6896-z
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DOI: https://doi.org/10.1007/s00216-013-6896-z