Use of factorial design for optimization of microwave-assisted digestion of lubricating oil

Detalhes bibliográficos
Autor(a) principal: Costa,Letícia M.
Data de Publicação: 2005
Outros Autores: Ferreira,Sérgio L. C., Nogueira,Ana Rita A., Nóbrega,Joaquim A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700027
Resumo: This 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.
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spelling Use of factorial design for optimization of microwave-assisted digestion of lubricating oilfactorial designmicrowave-assisted digestionlubricating oilmetalsThis 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.Sociedade Brasileira de Química2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700027Journal of the Brazilian Chemical Society v.16 n.6a 2005reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532005000700027info:eu-repo/semantics/openAccessCosta,Letícia M.Ferreira,Sérgio L. C.Nogueira,Ana Rita A.Nóbrega,Joaquim A.eng2006-01-04T00:00:00Zoai:scielo:S0103-50532005000700027Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-01-04T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
title Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
spellingShingle Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
Costa,Letícia M.
factorial design
microwave-assisted digestion
lubricating oil
metals
title_short Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
title_full Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
title_fullStr Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
title_full_unstemmed Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
title_sort Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
author Costa,Letícia M.
author_facet Costa,Letícia M.
Ferreira,Sérgio L. C.
Nogueira,Ana Rita A.
Nóbrega,Joaquim A.
author_role author
author2 Ferreira,Sérgio L. C.
Nogueira,Ana Rita A.
Nóbrega,Joaquim A.
author2_role author
author
author
dc.contributor.author.fl_str_mv Costa,Letícia M.
Ferreira,Sérgio L. C.
Nogueira,Ana Rita A.
Nóbrega,Joaquim A.
dc.subject.por.fl_str_mv factorial design
microwave-assisted digestion
lubricating oil
metals
topic factorial design
microwave-assisted digestion
lubricating oil
metals
description This 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.
publishDate 2005
dc.date.none.fl_str_mv 2005-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700027
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700027
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532005000700027
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.16 n.6a 2005
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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