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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/14916
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dc.contributor.authorBarros, Joélia Martins-
dc.contributor.authorBezerra, Marcos de Almeida-
dc.contributor.authorValasques, Gisseli Souza-
dc.contributor.authorNascimento Júnior, Baraquízio Braga do-
dc.contributor.authorSouza, Anderson Santos-
dc.contributor.authorAragão, Nádia Machado de-
dc.creatorBarros, Joélia Martins-
dc.creatorBezerra, Marcos de Almeida-
dc.creatorValasques, Gisseli Souza-
dc.creatorNascimento Júnior, Baraquízio Braga do-
dc.creatorSouza, Anderson Santos-
dc.creatorAragão, Nádia Machado de-
dc.date.accessioned2014-05-06T14:03:53Z-
dc.date.available2014-05-06T14:03:53Z-
dc.date.issued2013-
dc.identifier.issn0001-3765-
dc.identifier.urihttp://repositorio.ufba.br/ri/handle/ri/14916-
dc.descriptionp. 891-902pt_BR
dc.description.abstractIn this work, multivariate optimization techniques were used to develop a method based on the ultrasound-assisted extraction for copper, manganese, nickel and zinc determination from rations for chicken nutrition using flame atomic absorption spectrometry. The proportions of extracting components (2.0 mol.L–1 nitric, hydrochloric and acetic acid solutions) were optimized using centroid-simplex mixture design. The optimum proportions of this mixture taken as percentage of each component were respectively 20%, 37% and 43%. Variables of method (sample mass, sonication time and final acid concentration) were optimized using Doehlert design. The optimum values found for these variables were respectively 0.24 g, 18s and 3.6 mol.L–1. The developed method allows copper, manganese, nickel and zinc determination with quantification limits of 2.82; 4.52; 10.7; e 9.69 µg.g–1, and precision expressed as relative standard deviation (%RSD, 25 µg.g–1, N = 5) of 5.30; 2.13; 0.88; and 0.83%, respectively. This method was applied in the analytes determination from chicken rations collected from specialized commerce in Jequié city (Bahia State/Brazil). Application of paired t-test at the obtained results, in a confidence level of 95%, does not show significant difference between the proposed method and the microwave-assisted digestion.pt_BR
dc.language.isoenpt_BR
dc.rightsAcesso Abertopt_BR
dc.sourcehttp://dx.doi.org/10.1590/S0001-37652013000300005pt_BR
dc.subjectRations to chickenpt_BR
dc.subjectUltrasound-assisted extractionpt_BR
dc.subjectMixture designpt_BR
dc.subjectDoehlert designpt_BR
dc.subjectMetalspt_BR
dc.titleMultivariate optimization of an ultrasound-assisted extraction procedure for Cu, Mn, Ni and Zn determination in ration to chickenspt_BR
dc.title.alternativeAnais da Academia Brasileira de Cienciaspt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 85, n. 3pt_BR
dc.publisher.countryBrasilpt_BR
Aparece nas coleções:Artigo Publicado em Periódico (IMS)

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