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Monitoring pesticide residues in greenhouse tomato by combining acetonitrile-based extraction with dispersive liquid–liquid microextraction followed by gas-chromatography–mass spectrometry

2012-06Artigo científico Acesso restrito
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dc.contributor.authorMelo, Armindo
dc.contributor.authorC. Cunha, Sara
dc.contributor.authorMansilha, Catarina
dc.contributor.authorAguiar, Ana
dc.contributor.authorPinho, Olívia
dc.contributor.authorFerreira, Isabel M.P.L.V.O.
dc.date.accessioned2013-01-25T18:05:58Z
dc.date.available2013-01-25T18:05:58Z
dc.date.issued2012-06
dc.description.abstractA multiclass and multiresidue method for pesticide analysis in tomato was validated. Extraction and preconcentration of the pesticide residues from acetonitrile extracts was performed by using dispersive liquid–liquid microextraction (DLLME) technique, followed by gas chromatography–mass detection. DLLME was performed using carbon tetrachloride as extractive solvent and acetonitrile extract as dispersive solvent, in order to increase enrichment factor of the extraction procedure. Validation parameters indicated the suitability of the method for routine analyses of thirty pesticides in a large number of samples. In general, pesticide recoveries ranged between 70% and 110% and repeatability ranged between 1% and 20%. The proposed method was applied to the monitoring of pesticides in tomatoes grown during winter in greenhouses. Among the compounds considered in this work, cyprodinil was found in tomato at concentrations of 0.33 mg/kg, other pesticides like azoxystrobin, fenhexanid, tolyfluanid, k-cyhalothrin and trifloxystrobin were also detected, but, not quantified.por
dc.identifier.citationFood Chem. 2012 Dec 1;135(3):1071-7. Epub 2012 Jun 7.por
dc.identifier.issn0308-8146
dc.identifier.otherdoi: 10.1016/j.foodchem.2012.05.112
dc.identifier.urihttp://hdl.handle.net/10400.18/1159
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://ac.els-cdn.com/S0308814612009612/1-s2.0-S0308814612009612-main.pdf?_tid=5f05213e-6719-11e2-8bb9-00000aacb35d&acdnat=1359137124_1d71c8165f51526c27e8d08ec282edccpor
dc.subjectTomatopor
dc.subjectPesticidespor
dc.subjectImproved Extraction Procedurepor
dc.subjectDispersive Liquid–liquid Microextractionpor
dc.subjectGas Chromatography–mass Detectionpor
dc.subjectÁgua e Solopor
dc.titleMonitoring pesticide residues in greenhouse tomato by combining acetonitrile-based extraction with dispersive liquid–liquid microextraction followed by gas-chromatography–mass spectrometrypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1077por
oaire.citation.startPage1071por
oaire.citation.titleFood Chemistrypor
oaire.citation.volume135por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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