Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry

Detalhes bibliográficos
Autor(a) principal: Amorim, Fábio Alan Carqueija
Data de Publicação: 2005
Outros Autores: Ferreira, Sergio Luis Costa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6602
Resumo: Trabalho completo: acesso restrito, p. 960–964
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spelling Amorim, Fábio Alan CarqueijaFerreira, Sergio Luis CostaAmorim, Fábio Alan CarqueijaFerreira, Sergio Luis Costa2012-08-17T19:30:59Z2005-02-280039-9140http://www.repositorio.ufba.br/ri/handle/ri/6602v. 65, n. 4Trabalho completo: acesso restrito, p. 960–964In the present paper, a simultaneous pre-concentration procedure for the sequential determination of cadmium and lead in table salt samples using flame atomic absorption spectrometry is proposed. This method is based on the liquid–liquid extraction of cadmium(II) and lead(II) ions as dithizone complexes and direct aspiration of the organic phase for the spectrometer. The sequential determination of cadmium and lead is possible using a computer program. The optimization step was performed by a two-level fractional factorial design involving the variables: pH, dithizone mass, shaking time after addition of dithizone and shaking time after addition of solvent. In the studied levels these variables are not significant. The experimental conditions established propose a sample volume of 250 mL and the extraction process using 4.0 mL of methyl isobutyl ketone. This way, the procedure allows determination of cadmium and lead in table salt samples with a pre-concentration factor higher than 80, and detection limits of 0.3 ng g−1 for cadmium and 4.2 ng g−1 for lead. The precision expressed as relative standard deviation (n = 10) were 5.6 and 2.6% for cadmium concentration of 2 and 20 ng g−1, respectively, and of 3.2 and 1.1% for lead concentration of 20 and 200 ng g−1, respectively. Recoveries of cadmium and lead in several samples, measured by standard addition technique, proved also that this procedure is not affected by the matrix and can be applied satisfactorily for the determination of cadmium and lead in saline samples. The method was applied for the evaluation of the concentration of cadmium and lead in table salt samples consumed in Salvador City, Bahia, Brazil.Submitted by Bruna Lessa (lessbruna@gmail.com) on 2012-08-17T19:30:59Z No. of bitstreams: 1 (167).pdf: 427421 bytes, checksum: 27557d254ee07c25f1ecec2816d208eb (MD5)Made available in DSpace on 2012-08-17T19:30:59Z (GMT). No. of bitstreams: 1 (167).pdf: 427421 bytes, checksum: 27557d254ee07c25f1ecec2816d208eb (MD5) Previous issue date: 2005-02-28Elsevierhttp://dx.doi.org/10.1016/j.talanta.2004.08.027reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBACadmiumLeadTable salt samplesDetermination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometryTalantainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINAL(167).pdf(167).pdfapplication/pdf427421https://repositorio.ufba.br/bitstream/ri/6602/1/%28167%29.pdf27557d254ee07c25f1ecec2816d208ebMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/6602/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT(167).pdf.txt(167).pdf.txtExtracted texttext/plain0https://repositorio.ufba.br/bitstream/ri/6602/3/%28167%29.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD53ri/66022022-08-08 13:17:27.82oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-08-08T16:17:27Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
dc.title.alternative.pt_BR.fl_str_mv Talanta
title Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
spellingShingle Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
Amorim, Fábio Alan Carqueija
Cadmium
Lead
Table salt samples
title_short Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
title_full Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
title_fullStr Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
title_full_unstemmed Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
title_sort Determination of cadmium and lead in table salt by sequential multi-element flame atomic absorption spectrometry
author Amorim, Fábio Alan Carqueija
author_facet Amorim, Fábio Alan Carqueija
Ferreira, Sergio Luis Costa
author_role author
author2 Ferreira, Sergio Luis Costa
author2_role author
dc.contributor.author.fl_str_mv Amorim, Fábio Alan Carqueija
Ferreira, Sergio Luis Costa
Amorim, Fábio Alan Carqueija
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv Cadmium
Lead
Table salt samples
topic Cadmium
Lead
Table salt samples
description Trabalho completo: acesso restrito, p. 960–964
publishDate 2005
dc.date.issued.fl_str_mv 2005-02-28
dc.date.accessioned.fl_str_mv 2012-08-17T19:30:59Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6602
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 65, n. 4
identifier_str_mv 0039-9140
v. 65, n. 4
url http://www.repositorio.ufba.br/ri/handle/ri/6602
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.talanta.2004.08.027
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instacron_str UFBA
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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