Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry
Autor(a) principal: | |
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Data de Publicação: | 2015 |
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=S0103-50532015000100147 |
Resumo: | This work aimed to develop a methodology for simultaneous determination of Na, K and Ca in biodiesel samples by flame atomic emission spectrometry, using a continuous electromagnetic radiation detector. Two procedures were employed for biodiesel sample preparation: direct dilution with kerosene and sample emulsification with HNO3, n-butanol and Triton X-100. The proposed methodology presented good linearity, relative standard deviations less than 5% and limits of quantification of 0.05 and 0.02 mg kg–1 for Na and K, respectively, using emulsification and solvent dilution. For Ca, the limit of quantification was 0.2 and 1.0 mg kg–1, applying direct dilution and emulsion, respectively. The emulsification procedure showed no matrix influence when recovery tests were performed (89-108%). Reference methodology (ABNT NBR 15553) was used to check the accuracy, presented consistent results at 95% confidence level, being suitable for biodiesel samples in a routine analysis. |
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Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometryatomic emission spectrometrybiodieseldirect dilutionemulsionsodiumpotassiumcalciumThis work aimed to develop a methodology for simultaneous determination of Na, K and Ca in biodiesel samples by flame atomic emission spectrometry, using a continuous electromagnetic radiation detector. Two procedures were employed for biodiesel sample preparation: direct dilution with kerosene and sample emulsification with HNO3, n-butanol and Triton X-100. The proposed methodology presented good linearity, relative standard deviations less than 5% and limits of quantification of 0.05 and 0.02 mg kg–1 for Na and K, respectively, using emulsification and solvent dilution. For Ca, the limit of quantification was 0.2 and 1.0 mg kg–1, applying direct dilution and emulsion, respectively. The emulsification procedure showed no matrix influence when recovery tests were performed (89-108%). Reference methodology (ABNT NBR 15553) was used to check the accuracy, presented consistent results at 95% confidence level, being suitable for biodiesel samples in a routine analysis.Sociedade Brasileira de Química2015-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000100147Journal of the Brazilian Chemical Society v.26 n.1 2015reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20140231info:eu-repo/semantics/openAccessRaposo,Juliana D.Costa,Letícia M.Barbeira,Paulo Jorge S.eng2015-02-03T00:00:00Zoai:scielo:S0103-50532015000100147Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2015-02-03T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
title |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
spellingShingle |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry Raposo,Juliana D. atomic emission spectrometry biodiesel direct dilution emulsion sodium potassium calcium |
title_short |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
title_full |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
title_fullStr |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
title_full_unstemmed |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
title_sort |
Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic Emission Spectrometry |
author |
Raposo,Juliana D. |
author_facet |
Raposo,Juliana D. Costa,Letícia M. Barbeira,Paulo Jorge S. |
author_role |
author |
author2 |
Costa,Letícia M. Barbeira,Paulo Jorge S. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Raposo,Juliana D. Costa,Letícia M. Barbeira,Paulo Jorge S. |
dc.subject.por.fl_str_mv |
atomic emission spectrometry biodiesel direct dilution emulsion sodium potassium calcium |
topic |
atomic emission spectrometry biodiesel direct dilution emulsion sodium potassium calcium |
description |
This work aimed to develop a methodology for simultaneous determination of Na, K and Ca in biodiesel samples by flame atomic emission spectrometry, using a continuous electromagnetic radiation detector. Two procedures were employed for biodiesel sample preparation: direct dilution with kerosene and sample emulsification with HNO3, n-butanol and Triton X-100. The proposed methodology presented good linearity, relative standard deviations less than 5% and limits of quantification of 0.05 and 0.02 mg kg–1 for Na and K, respectively, using emulsification and solvent dilution. For Ca, the limit of quantification was 0.2 and 1.0 mg kg–1, applying direct dilution and emulsion, respectively. The emulsification procedure showed no matrix influence when recovery tests were performed (89-108%). Reference methodology (ABNT NBR 15553) was used to check the accuracy, presented consistent results at 95% confidence level, being suitable for biodiesel samples in a routine analysis. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 |
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=S0103-50532015000100147 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532015000100147 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20140231 |
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.26 n.1 2015 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_ |
1750318176657211392 |