DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS

Detalhes bibliográficos
Autor(a) principal: Souza,Alexander O. de
Data de Publicação: 2015
Outros Autores: Pereira,Camila C., Jado,Bruna M., Oreste,Eliézer Q., Vieira,Mariana A., Ribeiro,Anderson S., Vendruscolo,Claire T., Nunes,Adriane M.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000200209
Resumo: This paper describes the evaluation of a method for determination of Cd and Pb in xanthan gum samples by Graphite Furnace Atomic Absorption Spectrometry (GF AAS) using NH4H2PO4 as the chemical modifier. The sample preparation was performed using a reflux system adapted in the digestion tubes. With this system it was possible to increase the temperature of the digester block above the boiling point of the reaction medium, preventing loss of analyte and excessive evaporation of acids during heating. Samples were digested with HNO3 for 3 h in a digester block at 220 ºC. The limits of detection for Cd and Pb were 2.2 and 33.8 ng g-1, respectively. The RSDs for both analytes were, on average, lower than 5.0% and accuracy was verified by recovery tests, yielding values in the 83-100% range.
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spelling DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAScadmiumleadxanthan gumreflux systemGF AASThis paper describes the evaluation of a method for determination of Cd and Pb in xanthan gum samples by Graphite Furnace Atomic Absorption Spectrometry (GF AAS) using NH4H2PO4 as the chemical modifier. The sample preparation was performed using a reflux system adapted in the digestion tubes. With this system it was possible to increase the temperature of the digester block above the boiling point of the reaction medium, preventing loss of analyte and excessive evaporation of acids during heating. Samples were digested with HNO3 for 3 h in a digester block at 220 ºC. The limits of detection for Cd and Pb were 2.2 and 33.8 ng g-1, respectively. The RSDs for both analytes were, on average, lower than 5.0% and accuracy was verified by recovery tests, yielding values in the 83-100% range.Sociedade Brasileira de Química2015-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000200209Química Nova v.38 n.2 2015reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0100-4042.20140298info:eu-repo/semantics/openAccessSouza,Alexander O. dePereira,Camila C.Jado,Bruna M.Oreste,Eliézer Q.Vieira,Mariana A.Ribeiro,Anderson S.Vendruscolo,Claire T.Nunes,Adriane M.por2015-04-09T00:00:00Zoai:scielo:S0100-40422015000200209Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2015-04-09T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
title DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
spellingShingle DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
Souza,Alexander O. de
cadmium
lead
xanthan gum
reflux system
GF AAS
title_short DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
title_full DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
title_fullStr DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
title_full_unstemmed DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
title_sort DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
author Souza,Alexander O. de
author_facet Souza,Alexander O. de
Pereira,Camila C.
Jado,Bruna M.
Oreste,Eliézer Q.
Vieira,Mariana A.
Ribeiro,Anderson S.
Vendruscolo,Claire T.
Nunes,Adriane M.
author_role author
author2 Pereira,Camila C.
Jado,Bruna M.
Oreste,Eliézer Q.
Vieira,Mariana A.
Ribeiro,Anderson S.
Vendruscolo,Claire T.
Nunes,Adriane M.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Souza,Alexander O. de
Pereira,Camila C.
Jado,Bruna M.
Oreste,Eliézer Q.
Vieira,Mariana A.
Ribeiro,Anderson S.
Vendruscolo,Claire T.
Nunes,Adriane M.
dc.subject.por.fl_str_mv cadmium
lead
xanthan gum
reflux system
GF AAS
topic cadmium
lead
xanthan gum
reflux system
GF AAS
description This paper describes the evaluation of a method for determination of Cd and Pb in xanthan gum samples by Graphite Furnace Atomic Absorption Spectrometry (GF AAS) using NH4H2PO4 as the chemical modifier. The sample preparation was performed using a reflux system adapted in the digestion tubes. With this system it was possible to increase the temperature of the digester block above the boiling point of the reaction medium, preventing loss of analyte and excessive evaporation of acids during heating. Samples were digested with HNO3 for 3 h in a digester block at 220 ºC. The limits of detection for Cd and Pb were 2.2 and 33.8 ng g-1, respectively. The RSDs for both analytes were, on average, lower than 5.0% and accuracy was verified by recovery tests, yielding values in the 83-100% range.
publishDate 2015
dc.date.none.fl_str_mv 2015-02-01
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=S0100-40422015000200209
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000200209
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.5935/0100-4042.20140298
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.38 n.2 2015
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
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