Use of factorial design for optimization of microwave-assisted digestion of lubricating oil
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , |
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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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 |
_version_ |
1750318166632824832 |