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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/12783
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dc.contributor.authorBezerra, Marcos de Almeida-
dc.contributor.authorFerreira, Sergio Luis Costa-
dc.contributor.authorSantelli, Ricardo Erthal-
dc.contributor.authorSantAna, Otoniel Domingos de-
dc.contributor.authorCassella, Ricardo Jorgensen-
dc.creatorBezerra, Marcos de Almeida-
dc.creatorFerreira, Sergio Luis Costa-
dc.creatorSantelli, Ricardo Erthal-
dc.creatorSantAna, Otoniel Domingos de-
dc.creatorCassella, Ricardo Jorgensen-
dc.date.accessioned2013-08-29T17:36:59Z-
dc.date.issued2006-
dc.identifier.issn0039-9140-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/12783-
dc.description.abstractThis article describes the development by response surface methodology (RSM) of a procedure for iron, zinc and manganese determination by flame atomic absorption spectrometry (FAAS) in food samples after digestion employing a focussed microwave system. A Doehlert matrix was used to find optimal conditions for the procedure through response surface study. Three variables (irradiation power and time and composition of oxidant solution—HNO3 + H2O2) were regarded as factors in the optimization study. The working conditions were established as a compromise between optimum values found for each analyte taking into consideration the robustness of the procedure. These values were 12 min, 260 W and 42% (v/v) for irradiation time, irradiation power and percent of H2O2 in solution, respectively. The accuracy of the optimized procedure was evaluated by analysis of certified reference materials and by comparison with a well-established closed vessel microwave dissolution methodology.pt_BR
dc.description.sponsorshipTexto completo: acesso restrito.p.1083–1088pt_BR
dc.language.isoenpt_BR
dc.sourcehttp://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.talanta.2005.07.010pt_BR
dc.subjectMultivariate optimizationpt_BR
dc.subjectDoehlert matrixpt_BR
dc.subjectIronpt_BR
dc.subjectZincpt_BR
dc.subjectManganesept_BR
dc.subjectFAASpt_BR
dc.titleMultivariate technique for optimization of digestion procedure by focussed microwave system for determination of Mn, Zn and Fe in food samples using FAASpt_BR
dc.title.alternativeTalantapt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv.68 n. 4pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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