You are in the accessibility menu

Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorAmaral, Clarice D. B.-
dc.contributor.authorDionísio, Amália G. G.-
dc.contributor.authorSantos, Mirian C.-
dc.contributor.authorDonati, George L.-
dc.contributor.authorNóbrega, Joaquim A.-
dc.contributor.authorNogueira, Ana R. A.-
dc.identifier.citationJournal of Analytical Atomic Spectrometry, v. 28, n. 8, p. 1303-1310, 2013.-
dc.description.abstractDifferent conditions of extraction using water, a methanol-water mixture and nitric acid solutions were evaluated for speciation of As(iii), As(v), DMA and MMA in plant samples that previously received As(v) after being sown and emergence was investigated. Microwave-assisted extraction (MAE) using diluted nitric acid solutions was also performed for arsenic extraction from chicken feed samples. The separation and determination of arsenic species were performed using HPLC-ICP-MS. The interference standard method (IFS) using 83Kr+ as the IFS probe was employed to minimize spectral interferences caused by polyatomic species, such as 40Ar 35Cl+. The extraction procedures tested presented adequate extraction efficiencies (90%), and the four arsenic species evaluated were found in plant samples. Extractions with diluted nitric acid solution at 90 °C were the most efficient strategy, with quantitative recoveries for all four As species in plant tissues. On the other hand, the methanol-water mixture was the solvent with the lowest extraction efficiency (50-60%). For chicken feed samples, MAE at 100 °C for 30 min resulted in an extraction efficiency of 97% and only As(v) was found, without any species interconversion. The IFS method contributed to improving precision and limits of detection and quantification for all tested extraction procedures. Significant improvements on accuracy were obtained by applying the IFS method and recoveries between 77 and 94%, and 82 and 93% were obtained for plant extracts and chicken feed samples, respectively. This journal is © 2013 The Royal Society of Chemistry.en
dc.titleEvaluation of sample preparation procedures and krypton as an interference standard probe for arsenic speciation by HPLC-ICP-QMSen
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationGroup of Applied Instrumental Analysis Department of Chemistry Federal University of São Carlos, Caixa Postal 676 13560-970, São Carlos SP-
dc.description.affiliationEmbrapa Southeast Livestock, Caixa Postal 339, São Carlos SP-
dc.description.affiliationDepartment of Physics and Chemistry São Paulo State University Campus Ilha Solteira, SP-
dc.description.affiliationUnespDepartment of Physics and Chemistry São Paulo State University Campus Ilha Solteira, SP-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Analytical Atomic Spectrometry-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.