Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite
Autor(a) principal: | |
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Data de Publicação: | 1998 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300003 |
Resumo: | A method for the determination of phosphorus in steel samples by graphite furnace atomic absorption spectrometry, using the Zeeman effect background correction and the STPF conditions is proposed. The effect of iron (III) on the phosphorus signal was studied. It was verified, through the pyrolysis temperature curves, that iron (III) is an efficient chemical modifier, thermically stabilizing phosphorus up to 1400ºC. The phosphorus signal increases with the iron (III) concentration, but in the range, which corresponds to the usual concentrations of iron in the sample solutions, the increase is small. Phosphorus was determined in three standard reference materials, after its dissolution in a mixture of hydrochloric and perchloric acids in a PTFE bomb. The agreement with the certified concentration values was excellent. Iron (III) was added to the reference analytical solutions prepared in the blank of the dissolution, while the sample solutions were measured directly, since they already contained the modifier. The detection limit (k = 2) was 0.0042% of phosphorus in the steel sample. |
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Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafitegraphite furnace atomic absorption spectrometrysteelphosphorusA method for the determination of phosphorus in steel samples by graphite furnace atomic absorption spectrometry, using the Zeeman effect background correction and the STPF conditions is proposed. The effect of iron (III) on the phosphorus signal was studied. It was verified, through the pyrolysis temperature curves, that iron (III) is an efficient chemical modifier, thermically stabilizing phosphorus up to 1400ºC. The phosphorus signal increases with the iron (III) concentration, but in the range, which corresponds to the usual concentrations of iron in the sample solutions, the increase is small. Phosphorus was determined in three standard reference materials, after its dissolution in a mixture of hydrochloric and perchloric acids in a PTFE bomb. The agreement with the certified concentration values was excellent. Iron (III) was added to the reference analytical solutions prepared in the blank of the dissolution, while the sample solutions were measured directly, since they already contained the modifier. The detection limit (k = 2) was 0.0042% of phosphorus in the steel sample.Sociedade Brasileira de Química1998-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300003Química Nova v.21 n.3 1998reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40421998000300003info:eu-repo/semantics/openAccessCurtius,Adilson Josépor2003-12-04T00:00:00Zoai:scielo:S0100-40421998000300003Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2003-12-04T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
title |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
spellingShingle |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite Curtius,Adilson José graphite furnace atomic absorption spectrometry steel phosphorus |
title_short |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
title_full |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
title_fullStr |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
title_full_unstemmed |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
title_sort |
Determinação de fósforo em aços por espectrometria de absorção atômica no forno de grafite |
author |
Curtius,Adilson José |
author_facet |
Curtius,Adilson José |
author_role |
author |
dc.contributor.author.fl_str_mv |
Curtius,Adilson José |
dc.subject.por.fl_str_mv |
graphite furnace atomic absorption spectrometry steel phosphorus |
topic |
graphite furnace atomic absorption spectrometry steel phosphorus |
description |
A method for the determination of phosphorus in steel samples by graphite furnace atomic absorption spectrometry, using the Zeeman effect background correction and the STPF conditions is proposed. The effect of iron (III) on the phosphorus signal was studied. It was verified, through the pyrolysis temperature curves, that iron (III) is an efficient chemical modifier, thermically stabilizing phosphorus up to 1400ºC. The phosphorus signal increases with the iron (III) concentration, but in the range, which corresponds to the usual concentrations of iron in the sample solutions, the increase is small. Phosphorus was determined in three standard reference materials, after its dissolution in a mixture of hydrochloric and perchloric acids in a PTFE bomb. The agreement with the certified concentration values was excellent. Iron (III) was added to the reference analytical solutions prepared in the blank of the dissolution, while the sample solutions were measured directly, since they already contained the modifier. The detection limit (k = 2) was 0.0042% of phosphorus in the steel sample. |
publishDate |
1998 |
dc.date.none.fl_str_mv |
1998-06-01 |
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=S0100-40421998000300003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300003 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.1590/S0100-40421998000300003 |
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 |
Química Nova v.21 n.3 1998 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318100477116416 |