Liquid chromatography–electrospray ionization tandem mass spectrometry and dynamic multiple reaction monitoring method for determining multiple pesticide residues in tomato

•A QuEChERS method was developed to determine 57 pesticides in tomato.•The compounds were separated through analytical column with 1.8μm particle size.•The method is based on LC coupled to tandem MS.•LC–ESI-MS/MS in DMRM mode was used for the detection of compounds.•Some tomato samples analyzed exce...

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Bibliographic Details
Published in:Food chemistry 2015-05, Vol.175, p.57-65
Main Authors: Andrade, G.C.R.M., Monteiro, S.H., Francisco, J.G., Figueiredo, L.A., Botelho, R.G., Tornisielo, V.L.
Format: Article
Language:English
Subjects:
Chromatography, Liquid - methods
Fruit - chemistry
LC–ESI-MS/MS
Lycopersicon esculentum - chemistry
Pesticide Residues - analysis
Pesticides
Pesticides - analysis
QuEChERS
Spectrometry, Mass, Electrospray Ionization - methods
Tomato
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Summary:•A QuEChERS method was developed to determine 57 pesticides in tomato.•The compounds were separated through analytical column with 1.8μm particle size.•The method is based on LC coupled to tandem MS.•LC–ESI-MS/MS in DMRM mode was used for the detection of compounds.•Some tomato samples analyzed exceeded the MRL established by the European Commission. A quick and sensitive liquid chromatography–electrospray ionization tandem mass spectrometry method, using dynamic multiple reaction monitoring and a 1.8-μm particle size analytical column, was developed to determine 57 pesticides in tomato in a 13-min run. QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for samples preparations and validations was carried out in compliance with EU SANCO guidelines. The method was applied to 58 tomato samples. More than 84% of the compounds investigated showed limits of detection equal to or lower than 5mgkg−1. A mild (50%) matrix effect was observed for 72%, 25%, and 3% of the pesticides studied, respectively. Eighty-one percent of the pesticides showed recoveries ranging between 70% and 120%. Twelve pesticides were detected in 35 samples, all below the maximum residue levels permitted in the Brazilian legislation; 15 samples exceeded the maximum residue levels established by the EU legislation for methamidophos; and 10 exceeded limits for acephate and four for bromuconazole.
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2014.11.105