An on-line system for preconcentration and determination of lead in wine samples by FAAS

Detalhes bibliográficos
Autor(a) principal: Lemos, Valfredo Azevedo
Data de Publicação: 2002
Outros Autores: Guardia, Miguel de la, 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/7461
Resumo: Texto completo: acesso restrito. p. 475-480
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spelling Lemos, Valfredo AzevedoGuardia, Miguel de laFerreira, Sergio Luis CostaLemos, Valfredo AzevedoGuardia, Miguel de laFerreira, Sergio Luis Costa2012-12-12T16:18:26Z2002-090039-9140http://www.repositorio.ufba.br/ri/handle/ri/7461v. 58, n. 3Texto completo: acesso restrito. p. 475-480A flow injection method has been developed for the direct determination of free available Pb(II) and total Pb content in wine samples. The method is based on the chemical sorption of Pb(II), from pH 7 buffered solutions, on a packed polyurethane foam column, modified by addition of 2-(2-benzothiazolylazo)-p-cresol (BTAC). After this step, lead was directly eluted with a stream of 0.1 mol l−1 HCl into an air C2H2 flame in which lead was determined by atomic absorption spectrometry. Total lead was analyzed after sample digestion with nitric acid and hydrogen peroxide, being free available lead determined by direct sample on-line preconcentration and elution. The method provides a limit of detection (3σ) of 1 μg l−1 lead and relative standard deviation, which varies from 6 to 0.7% for lead concentration of 10 and 500 μg l−1. Total content of lead in wine samples analyzed varied from 8 to 42 μg l−1 being obtained free available values of Pb(II) under the limit of detection of the method. Recovery studies on natural wine samples, spicked with inorganic lead, evidenced the remaining capability of ligands, present in the wine, to avoid lead retention on the polyurethane foam loaded with BTAC.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2012-12-12T16:18:26Z No. of bitstreams: 1 1-s2.0-S0039914002003259-main.pdf: 125266 bytes, checksum: bee429520e3071777d2a539c78ba2b5c (MD5)Made available in DSpace on 2012-12-12T16:18:26Z (GMT). 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dc.title.pt_BR.fl_str_mv An on-line system for preconcentration and determination of lead in wine samples by FAAS
dc.title.alternative.pt_BR.fl_str_mv Talanta
title An on-line system for preconcentration and determination of lead in wine samples by FAAS
spellingShingle An on-line system for preconcentration and determination of lead in wine samples by FAAS
Lemos, Valfredo Azevedo
Lead
Wine
FAAS
On-line
title_short An on-line system for preconcentration and determination of lead in wine samples by FAAS
title_full An on-line system for preconcentration and determination of lead in wine samples by FAAS
title_fullStr An on-line system for preconcentration and determination of lead in wine samples by FAAS
title_full_unstemmed An on-line system for preconcentration and determination of lead in wine samples by FAAS
title_sort An on-line system for preconcentration and determination of lead in wine samples by FAAS
author Lemos, Valfredo Azevedo
author_facet Lemos, Valfredo Azevedo
Guardia, Miguel de la
Ferreira, Sergio Luis Costa
author_role author
author2 Guardia, Miguel de la
Ferreira, Sergio Luis Costa
author2_role author
author
dc.contributor.author.fl_str_mv Lemos, Valfredo Azevedo
Guardia, Miguel de la
Ferreira, Sergio Luis Costa
Lemos, Valfredo Azevedo
Guardia, Miguel de la
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv Lead
Wine
FAAS
On-line
topic Lead
Wine
FAAS
On-line
description Texto completo: acesso restrito. p. 475-480
publishDate 2002
dc.date.issued.fl_str_mv 2002-09
dc.date.accessioned.fl_str_mv 2012-12-12T16:18:26Z
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/7461
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 58, n. 3
identifier_str_mv 0039-9140
v. 58, n. 3
url http://www.repositorio.ufba.br/ri/handle/ri/7461
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.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/S0039-9140(02)00325-9
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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