Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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=S0103-50532018000300571 |
Resumo: | A method for chlorine determination in crude oil samples, through the formation of MgCl molecule, by high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) was developed and is described in this paper. The use of this molecule for chlorine determination in crude oil has not been reported up to now. Measures were carried out at the wavelength 377.010 nm and the samples were submitted to a simple treatment as emulsion, whose composition was optimized applying a simplex-centroid experimental design. Magnesium was used as molecule forming agent at the concentration of 10 g L-1, at least 500 times higher than the concentration of chlorine. This excess is required to ensure the molecule formation of all content of Cl present in the sample. Chemical modifier Pd was used and improved greatly the signal intensities. Optimized pyrolysis and vaporization temperatures, applied for determination, were 800 and 2300 °C, respectively. Accuracy was evaluated through analysis of certified reference materials, NIST 1848 and NIST 1634c, and addition and recovery tests with recoveries between 92 and 117%. Limits of detection and quantification were 3.0 and 9.0 µg g-1, respectively. The method was applied to eight crude oil samples. |
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Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MASchlorinemagnesium monochloridecrude oilemulsionHR-CS GF MASA method for chlorine determination in crude oil samples, through the formation of MgCl molecule, by high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) was developed and is described in this paper. The use of this molecule for chlorine determination in crude oil has not been reported up to now. Measures were carried out at the wavelength 377.010 nm and the samples were submitted to a simple treatment as emulsion, whose composition was optimized applying a simplex-centroid experimental design. Magnesium was used as molecule forming agent at the concentration of 10 g L-1, at least 500 times higher than the concentration of chlorine. This excess is required to ensure the molecule formation of all content of Cl present in the sample. Chemical modifier Pd was used and improved greatly the signal intensities. Optimized pyrolysis and vaporization temperatures, applied for determination, were 800 and 2300 °C, respectively. Accuracy was evaluated through analysis of certified reference materials, NIST 1848 and NIST 1634c, and addition and recovery tests with recoveries between 92 and 117%. Limits of detection and quantification were 3.0 and 9.0 µg g-1, respectively. The method was applied to eight crude oil samples.Sociedade Brasileira de Química2018-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532018000300571Journal of the Brazilian Chemical Society v.29 n.3 2018reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0103-5053.20170169info:eu-repo/semantics/openAccessOliveira,Izabel K. S.Medeiros,Rina L. S.Silva,Djalma R.Maranhão,Tatiane A.eng2018-02-28T00:00:00Zoai:scielo:S0103-50532018000300571Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2018-02-28T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
title |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
spellingShingle |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS Oliveira,Izabel K. S. chlorine magnesium monochloride crude oil emulsion HR-CS GF MAS |
title_short |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
title_full |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
title_fullStr |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
title_full_unstemmed |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
title_sort |
Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR-CS MAS |
author |
Oliveira,Izabel K. S. |
author_facet |
Oliveira,Izabel K. S. Medeiros,Rina L. S. Silva,Djalma R. Maranhão,Tatiane A. |
author_role |
author |
author2 |
Medeiros,Rina L. S. Silva,Djalma R. Maranhão,Tatiane A. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Oliveira,Izabel K. S. Medeiros,Rina L. S. Silva,Djalma R. Maranhão,Tatiane A. |
dc.subject.por.fl_str_mv |
chlorine magnesium monochloride crude oil emulsion HR-CS GF MAS |
topic |
chlorine magnesium monochloride crude oil emulsion HR-CS GF MAS |
description |
A method for chlorine determination in crude oil samples, through the formation of MgCl molecule, by high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) was developed and is described in this paper. The use of this molecule for chlorine determination in crude oil has not been reported up to now. Measures were carried out at the wavelength 377.010 nm and the samples were submitted to a simple treatment as emulsion, whose composition was optimized applying a simplex-centroid experimental design. Magnesium was used as molecule forming agent at the concentration of 10 g L-1, at least 500 times higher than the concentration of chlorine. This excess is required to ensure the molecule formation of all content of Cl present in the sample. Chemical modifier Pd was used and improved greatly the signal intensities. Optimized pyrolysis and vaporization temperatures, applied for determination, were 800 and 2300 °C, respectively. Accuracy was evaluated through analysis of certified reference materials, NIST 1848 and NIST 1634c, and addition and recovery tests with recoveries between 92 and 117%. Limits of detection and quantification were 3.0 and 9.0 µg g-1, respectively. The method was applied to eight crude oil samples. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-03-01 |
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=S0103-50532018000300571 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532018000300571 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0103-5053.20170169 |
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.29 n.3 2018 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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1750318180448862208 |