One-year routine application of a new method based on liquid chromatography-tandem mass spectrometry to the analysis of 16 multiclass pesticides in vegetable samples

Journal of Chromatography. a
Ana AgüeraLuis Piedra

Abstract

An analytical procedure has been developed for determining a group of 16 multiclass pesticides most commonly used in crop protection. The extraction step is performed with a mixture of ethyl acetate and sodium sulphate, in the presence of 6.5 M NaOH. After evaporation, a final extract containing 1 mg sample/ml extract, is obtained in methanol. Analysis of the methanolic extract, without additional clean-up steps, is performed by liquid chromatography-electrospray ionisation-tandem mass spectrometry combining positive and negative ion mode. The analytical performance of the method has been validated for three different matrices: pepper, lettuce and aubergine. Mean recoveries obtained were between 70 and 110% in most of the cases with a precision of <28%. Linearity of response over 2 orders of magnitude was demonstrated (r > or = 0.99) with limits of detection < or = 0.01 mg/kg in all the cases. No significant matrix effects were observed with the exception of triflumizol that presented a drastic decrease in response as a consequence of an ion formation suppression effect in the presence of pepper matrix. The method has been applied to the analysis of 560 vegetable samples, as a part of the monitoring programme of the Association...Continue Reading

References

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Citations

Jun 2, 2007·Analytical and Bioanalytical Chemistry·Dimitra A Lambropoulou, Triantafyllos A Albanis
Oct 29, 2011·Analytical and Bioanalytical Chemistry·A LozanoA R Fernández-Alba
Mar 29, 2008·Environmental Monitoring and Assessment·Cornelia Kozmutza, Yolanda Picó
Jun 15, 2007·Analytical and Bioanalytical Chemistry·Hans G J MolSuryati Sunarto
Sep 7, 2005·Rapid Communications in Mass Spectrometry : RCM·Juan F García-ReyesAmadeo R Fernández-Alba
Jun 6, 2006·Mass Spectrometry Reviews·Sílvia Lacorte, Amadeo R Fernandez-Alba
Jun 20, 2006·Mass Spectrometry Reviews·W M A NiessenR Andreoli
Jun 22, 2006·Mass Spectrometry Reviews·Yolanda PicóMónica Fernández
Jul 26, 2005·Journal of Chromatography. a·Imma FerrerAmadeo R Fernánndez-Alba
Jun 7, 2006·Mass Spectrometry Reviews·Lutz AlderBärbel Vieth
Sep 1, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Antonio ValverdeFrancisco Camacho

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