Multiresidue analysis of pesticides in soil by supercritical fluid extraction/gas chromatography with electron-capture detection and confirmation by gas chromatography-mass spectrometry

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorRissato, SR
dc.creatorGalhiane, Mario Sergio
dc.creatorApon, B. M.
dc.creatorArruda, MSP
dc.date2014-05-20T13:25:39Z
dc.date2016-10-25T16:46:04Z
dc.date2014-05-20T13:25:39Z
dc.date2016-10-25T16:46:04Z
dc.date2005-01-12
dc.date.accessioned2017-04-05T20:03:39Z
dc.date.available2017-04-05T20:03:39Z
dc.identifierJournal of Agricultural and Food Chemistry. Washington: Amer Chemical Soc, v. 53, n. 1, p. 62-69, 2005.
dc.identifier0021-8561
dc.identifierhttp://hdl.handle.net/11449/8165
dc.identifierhttp://acervodigital.unesp.br/handle/11449/8165
dc.identifier10.1021/jf048772s
dc.identifierWOS:000226146500011
dc.identifierhttp://dx.doi.org/10.1021/jf048772s
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/856622
dc.descriptionThe applicability of supercritical fluid extraction (SFE) in pesticide multiresidue analysis (organohalogen, organonitrogen, organophosphorus, and pyrethroid) in soil samples was investigated. Fortification experiments were conducted to test the conventional extraction (solid-liquid) and to optimize the extraction procedure in SFE by varying the CO2 Modifier, temperature, extraction time, and pressure. The best efficiency was achieved at 400 bar using methanol as modifier at 60 degreesC. For the SFE method, C-18 cartridges were used for the cleanup. The analytical screening was performed by gas chromatography equipped with electron-capture detection (ECD). Recoveries for the majority of pesticides from spiked samples of soil at different residence times were 1, 20, and 40 days at the fortification level of 0.04-0.10 mg/kg ranging from 70 to 97% for both methods. The detection limits found were <0.01 mg/kg for ECD, and the confirmation of pesticide identity was performed by gas chromatography-mass spectrometry in a selected-ion monitoring mode. Multiresidue methods were applied in real soil samples, and the results of the methods developed were compared.
dc.languageeng
dc.publisherAmer Chemical Soc
dc.relationJournal of Agricultural and Food Chemistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectpesticide multiresidue analysis
dc.subjectsupercritical fluid extraction
dc.subjectcapillary gas chromatography-mass spectrometric detection with selective ion monitoring
dc.subjectsoil
dc.titleMultiresidue analysis of pesticides in soil by supercritical fluid extraction/gas chromatography with electron-capture detection and confirmation by gas chromatography-mass spectrometry
dc.typeOtro


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