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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/14330
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dc.contributor.authorOleszczuk, Nédio-
dc.contributor.authorCastro, Jacira T.-
dc.contributor.authorSilva, Márcia M. da-
dc.contributor.authorKorn, Maria das Graças Andrade-
dc.contributor.authorWelz, Bernhard-
dc.contributor.authorVale, Maria Goreti R.-
dc.creatorOleszczuk, Nédio-
dc.creatorCastro, Jacira T.-
dc.creatorSilva, Márcia M. da-
dc.creatorKorn, Maria das Graças Andrade-
dc.creatorWelz, Bernhard-
dc.creatorVale, Maria Goreti R.-
dc.date.accessioned2014-01-13T13:38:51Z-
dc.date.issued2007-
dc.identifier.issn0039-9140-
dc.identifier.urihttp://repositorio.ufba.br/ri/handle/ri/14330-
dc.descriptionTexto completo: acesso restrito. p. 862-869pt_BR
dc.description.abstractA method has been developed for the determination of cobalt, copper and manganese in green coffee using direct solid sampling electrothermal atomic absorption spectrometry (SS-ET AAS). The motivation for the study was that only a few elements might be suitable to determine the origin of green coffee so that the multi-element techniques usually applied for this purpose might not be necessary. The three elements have been chosen as test elements as they were found to be significant in previous investigations. A number of botanical certified reference materials (CRM) and pre-analyzed samples of green coffee have been used for method validation, and inductively coupled plasma optical emission spectrometry (ICP OES) after microwave-assisted acid digestion of the samples as reference method. Calibration against aqueous standards could be used for the determination of Mn and Co by SS-ET AAS, but calibration against solid CRM was necessary for the determination of Cu. No significant difference was found between the results obtained with the proposed method and certified or independently determined values. The limits of detection for Mn, Cu and Co were 0.012, 0.006 and 0.004 μg g−1 using SS-ET AAS and 0.015, 0.13 and 0.10 μg g−1 using ICP OES. Seven samples of Brazilian green coffee have been analyzed, and there was no significant difference between the values obtained with SS-ET AAS and ICP OES for Mn and Cu. ICP OES could not be used as a reference method for Co, as essentially all values were below the limit of quantification of this technique.pt_BR
dc.language.isoenpt_BR
dc.rightsAcesso Abertopt_BR
dc.sourcehttp://dx.doi.org/10.1016/j.talanta.2007.05.005pt_BR
dc.subjectElectrothermal atomic absorption spectrometrypt_BR
dc.subjectInductively coupled plasma optical emission spectrometrypt_BR
dc.subjectSolid samplingpt_BR
dc.subjectCoffeept_BR
dc.subjectCobaltpt_BR
dc.subjectCopperpt_BR
dc.subjectManganesept_BR
dc.titleMethod development for the determination of manganese, cobalt and copper in green coffee comparing direct solid sampling electrothermal atomic absorption spectrometry and inductively coupled plasma optical emission spectrometrypt_BR
dc.title.alternativeTalantapt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 73, n. 5pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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