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dc.contributor.authorCOSTA, L. M.pt_BR
dc.contributor.authorFERREIRA, S. L. C.pt_BR
dc.contributor.authorNOGUEIRA, A. R. de A.pt_BR
dc.contributor.authorNOBREGA, J. A.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2006-01-23pt_BR
dc.date.issued2005pt_BR
dc.identifier.citationJournal Brazilian Chemical Society, v. 16, n. 6a, p. 1269-1274, dec. 2005.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/47283pt_BR
dc.descriptionThis work proposes the use of factorial design for optimization of microwave-assisted digestion of lubricating oil. The accuracy of digestion procedures is affected by critical experimental parameters, such as sample amount, concentrated acid volumes, microwave radiation applied power, and digestion time. The effects of these key variables on the microwave-assisted digestion efficiency were investigated. The residual carbon content and the acidity were determined in all digestates after microwave-assisted digestion as response of the factorial design. Calcium, Cu, Mg, P, S, and Zn were determined in oil digestates obtained by using two systems: a cavity- and a focused-oven. The accuracy was checked using one standard reference material, NIST SRM 1848 - Lubricating Oil Additive Package. All determined and certified values are in agreement at a 95% confidence level. The digestion time, microwave applied power, sample mass, and the interaction between these variables were significant according to P-values when the analysis of variance (ANOVA) was used.eng
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectFactorial designpt_BR
dc.subjectMicrowave assisted digestioneng
dc.subjectLubricating oileng
dc.titleUse of factorial design for optimization of microwave-assisted digestion of lubricating oil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-05-13T11:11:11Zpt_BR
dc.subject.nalthesaurusMetalspt_BR
riaa.ainfo.id47283pt_BR
riaa.ainfo.lastupdate2016-05-13pt_BR
dc.identifier.doihttps://doi.org/10.1590/S0103-50532005000700027eng
dc.contributor.institutionLETÍCIA M. COSTA, Universidade Federal da Bahiapt_BR
dc.contributor.institutionSÉRGIO L. C. FERREIRA, Universidade Federal da Bahiaeng
dc.contributor.institutionANA RITA DE ARAUJO NOGUEIRA, CPPSEeng
dc.contributor.institutionJOAQUIM A. NÓBREGA, Universidade Federal de São Carlos.eng
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