Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/8323
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dc.contributor.authorFerreira, Sergio Luis Costa-
dc.contributor.authorSantos, Hilda Costa dos-
dc.contributor.authorCampos, Reinaldo C.-
dc.creatorFerreira, Sergio Luis Costa-
dc.creatorSantos, Hilda Costa dos-
dc.creatorCampos, Reinaldo C.-
dc.date.accessioned2013-02-01T14:31:32Z-
dc.date.issued2003-
dc.identifier.issn0039-9140-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/8323-
dc.descriptionTexto completo: acesso restrito. p. 789-795pt_BR
dc.description.abstractA system for molybdenum separation and enrichment aiming its determination in water and biological samples by graphite furnace atomic absorption spectrometry (GFAAS) is proposed. The procedure is based on the sorption of the molybdenum (VI) thiocyanate complex onto a mini-column packed with polyurethane foam (PUF). The elution is accomplished by a 3.0 mol l 1 nitric acid solution. Flow variables were optimized and an enrichment factor of 10 as well as a limit of detection (LOD) (3 s) of 0.08 mg l 1 in the sample solution were achieved. The coefficient of variation showed values of 3 and 2% for molybdenum solutions of 2.0 and 10.0 mg l 1, respectively. The accuracy of the method was confirmed by the good concordance between found and certified values in the analysis of certified reference materials (CRMs) (CASS-3 Nearshore Seawater, NIST 1547 Peach Leaves, NIST 1515 Apple Leaves and NIST 1572 Citrus Leaves). The procedure was also applied for the molybdenum determination in mineral waters as well as in produced water samples. The results obtained for the mineral water samples compared well with those obtained by ICPMS. Concerning the produced water samples, in spite of their large salinity, recoveries of 90 to 120% at the 1 mg l 1 were observedpt_BR
dc.language.isoenpt_BR
dc.publisherElservierpt_BR
dc.sourcehttp://dx.doi.org/10.1016/S0039-9140(03)00378-3pt_BR
dc.subjectMolybdenumpt_BR
dc.subjectGraphite furnacept_BR
dc.subjectPolyurethane foampt_BR
dc.titleThe determination of molybdenum in water and biological samples by graphite furnace atomic spectrometry after polyurethane foam column separation and preconcentrationpt_BR
dc.title.alternativeTalantapt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 61, n. 6pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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