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dc.contributor.authorPortolés Nicolau, Tania
dc.contributor.authorHernández Hernández, Félix
dc.contributor.authorDíaz San Pedro, Ramón
dc.contributor.authorIbáñez Martínez, María
dc.contributor.authorBustos López, Martha Cristina
dc.contributor.authorBotero-Coy, Ana Maria
dc.contributor.authorFuentes, C. L.
dc.contributor.authorPeñuela, Gustavo
dc.description.abstractThe irrigate district of Usosaldaña, an important agricultural area in Colombia mainly devoted to rice crop production, is subjected to an intensive use of pesticides. Monitoring these compounds is necessary to know the impact of phytosanitary products in the different environmental compartments. In this work, surface water and soil samples from different sites of this area have been analyzed by applying an analytical methodology for large screening based on the use of time-of-flight mass spectrometry (TOF MS) hyphenated to liquid chromatography (LC) and gas chromatography (GC). Several pesticides were detected and unequivocally identified, such as the herbicides atrazine, diuron or clomazone. Some of their main metabolites and/or transformation products (TPs) like deethylatrazine (DEA), deisopropylatrazine (DIA) and 3,4-dichloroaniline were also identified in the samples. Among fungicides, carbendazim, azoxystrobin, propiconazole and epoxiconazole were the most frequently detected. Insecticides such as thiacloprid, or p,p′-DDT metabolites (p,p′-DDD and p,p′-DDE) were also found. Thanks to the accurate-mass full-spectrum acquisition in TOF MS it was feasible to widen the number of compounds to be investigated to other families of contaminants. This allowed the detection of emerging contaminants, such as the antioxidant 3,5-di-tertbutyl-4-hydroxy-toluene (BHT), its metabolite 3,5-di-tert-butyl-4-hydroxy-benzaldehyde (BHT-CHO), or the solar filter benzophenone, among othersca_CA
dc.format.extent10 p.ca_CA
dc.relation.isPartOfScience of the total environment Volume 439, 15 November 2012ca_CA
dc.subjectTOF MSca_CA
dc.subjectLarge screeningca_CA
dc.subjectRice productionca_CA
dc.subject.otherEspectrometria de massesca_CA
dc.subject.otherArròs -- Aspectes ambientalsca_CA
dc.titleUse of time-of-flight mass spectrometry for large screening of organic pollutants in surface waters and soils from a rice production area in Colombiaca_CA

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