Determination of lead in medicinal plants by high-resolution continuum source graphite furnace atomic absorption spectrometry using direct solid sampling

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dc.contributor.authorRego, Jardes Figueredo [UNESP]
dc.contributor.authorVirgilio, Alex
dc.contributor.authorNobrega, Joaquim A.
dc.contributor.authorGomes Neto, José Anchieta [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2014-05-20T14:19:09Z
dc.date.available2014-05-20T14:19:09Z
dc.date.issued2012-10-15
dc.description.abstractA procedure is proposed for Pb determination in medicinal plants by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) using direct solid sampling. Among Pd(NO3)(2), Pd/Mg(NO3)(2). NH4H2PO4 and the W-coated platform tested as chemical modifiers, Pd(NO3)(2) presented the best performance. Calibration plots (10-1000 pg Pb) with regression coefficients better than 0.999 were typically obtained. Accuracy was checked for Pb determination in five plant certified reference materials. Results were in agreement with reference values at a 95% confidence level (paired t-test). Medicinal plant samples were analyzed by the proposed procedure and line-source GF MS using slurry sampling as a comparative technique. The RSD was 10% (n=3) for a sample containing 0.88 mu g g(-1) Pb. The limit of quantification (dry mass) was 0.024 mu g g(-1). The contents of Pb in medicinal plant samples varied in the 0.30-1.94 mu g g(-1) range. (C) 2012 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Chem, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 09/52480-0
dc.format.extent21-26
dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2012.08.038
dc.identifier.citationTalanta. Amsterdam: Elsevier B.V., v. 100, p. 21-26, 2012.
dc.identifier.doi10.1016/j.talanta.2012.08.038
dc.identifier.issn0039-9140
dc.identifier.lattes8708735699846578
dc.identifier.urihttp://hdl.handle.net/11449/25770
dc.identifier.wosWOS:000313773300004
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.subjectLeaden
dc.subjectMedicinal planten
dc.subjectDirect solid samplingen
dc.subjectHigh-resolution continuum source graphiteen
dc.subjectfurnace atomic absorption spectrometryen
dc.titleDetermination of lead in medicinal plants by high-resolution continuum source graphite furnace atomic absorption spectrometry using direct solid samplingen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes8708735699846578
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Analítica - IQ