Determination of sugar cane herbicides in soil and soil treated with sugar cane vinasse by solid-phase extraction and HPLC-UV

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dc.contributor.authorLourencetti, Carolina [UNESP]
dc.contributor.authorRodrigues de Marchi, Mary Rosa [UNESP]
dc.contributor.authorRibeiro, Maria Lucia [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:19:08Z
dc.date.available2014-05-20T14:19:08Z
dc.date.issued2008-12-15
dc.description.abstractThis Work reports oil the development and validation of a small-scale and efficient SPE-HPLC-UV method for the simultaneous determination of the most used herbicides (diuron, hexazinone, and tebuthiuron) applied to soil and soil treated with sugar cane vinasse (soil-vinasse) in areas where Sugar cane crops are grown in the state of São Paulo, Brazil. The analytical procedure was optimized for solvent extraction and HPLC-UV conditions. Extraction and clean-LIP were combined in a single step employing solid-phase extraction, avoiding sophisticated techniques, organic-solvent-water mixtures and consequently a longer concentration step. Recovery studies with soil and soil-vinasse samples spiked at two herbicides levels (around 0.25 and 2.0 mg kg(-1)) and sample stability (sample frozen for 20 days before analysis) were applied as parameters to control the efficiency of the method. Good accuracy and precision were achieved with average recoveries ranging from 78% to 120% and relative standard deviations less than 10% throughout the whole recovery test. The method's limit of detection ranged between 0.025 and 0.050 mg kg(-1) for diuron, hexazinone, and tebuthiuron in soil and soil-vinasse. The feasibility of this method was applied to determine the herbicide half-lives (t(1/2)) in soil and soil-vinasse in a laboratory Study. Sugar cane vinasse added to soil increased the degradation of diuron and tebuthiuron (p < 0.05), reducing the t(1/2) from 80 to 7 days and 128 to 73 days, respectively. This method is presented as an alternative which could be applied to assess herbicide behavior in soil in order to prevent water contamination and to contribute to establish pesticide limits in soil. (C) 2008 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ Unesp, Inst Chem, Dept Organ Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationSão Paulo State Univ Unesp, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ Unesp, Inst Chem, Dept Organ Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ Unesp, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent701-709
dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2008.07.013
dc.identifier.citationTalanta. Amsterdam: Elsevier B.V., v. 77, n. 2, p. 701-709, 2008.
dc.identifier.doi10.1016/j.talanta.2008.07.013
dc.identifier.issn0039-9140
dc.identifier.urihttp://hdl.handle.net/11449/25765
dc.identifier.wosWOS:000261416500041
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTalanta
dc.relation.ispartofjcr4.244
dc.relation.ispartofsjr1,186
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHerbicidesen
dc.subjectSoilen
dc.subjectVinasseen
dc.subjectSolid-phase extractionen
dc.subjectHPLC-UVen
dc.titleDetermination of sugar cane herbicides in soil and soil treated with sugar cane vinasse by solid-phase extraction and HPLC-UVen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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