Determination of herbicide residues in olive oil by gas chromatography–tandem mass spectrometry |
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Authors: | María A Aramendía Victoriano Borau Fernando Lafont Alberto Marinas José M Marinas José M Moreno Francisco J Urbano |
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Affiliation: | 1. Department of Organic Chemistry, University of Córdoba, Campus de Rabanales, Edificio C-3, E-14014 Córdoba, Spain;2. Servicio Central de Apoyo a la Investigación (SCAI), Unidad de Espectrometría de Masas, Universidad de Córdoba, Campus de Rabanales, E-14014 Córdoba, Spain |
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Abstract: | This paper reports a method for the analysis in olive oil of multiresidues of the herbicides of low-medium polarity most widely used by Andalusian olive growers. The method, which uses gas chromatography/tandem mass spectrometry (GC–MS/MS), was developed within the framework of Project CAO00-005, which spanned the period from 2000 to 2004. The results obtained for more than 3000 samples of virgin olive oil and organic olive oil analyzed over such a period are reported. Samples were extracted with an acetonitrile/n-hexane mixture and cleaned up by passage through Florisil columns prior to analysis. A linear determination range for the herbicides from 1 to 500 μg kg−1 and a correlation coefficient better than 0.996 were achieved. The reproducibility, as relative standard deviation, was quite acceptable (8–11%), and so were herbicide recoveries (90–102%). The proposed method has been transferred to both public and private laboratories in the Andalusian region. |
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Keywords: | Herbicides Olive oil Gas chromatography Tandem mass spectrometry Triazines Diuron Norflurazone Diflufenican Oxyfluorfen |
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