Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS

Detalhes bibliográficos
Autor(a) principal: Lemos, Valfredo Azevedo
Data de Publicação: 2000
Outros Autores: Santelli, Ricardo Erthal, Carvalho, Marcelo Souza de, 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/7308
Resumo: p.1497–1502
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spelling Lemos, Valfredo AzevedoSantelli, Ricardo ErthalCarvalho, Marcelo Souza deFerreira, Sergio Luis CostaLemos, Valfredo AzevedoSantelli, Ricardo ErthalCarvalho, Marcelo Souza deFerreira, Sergio Luis Costa2012-12-03T20:52:15Z20000584-8547http://www.repositorio.ufba.br/ri/handle/ri/7308v. 55, n. 9p.1497–1502In the present paper, the use of polyurethane foam modified by 2-(2-benzothiazolylazo)-2-p-cresol (BTAC) as a sorbent in an on-line preconcentration system to determine cadmium trace levels by FAAS is proposed. The procedure was based on the chemical sorption of cadmium (II) ions onto a minicolumn packed with polyurethane foam, followed by 0.10 mol l−1 hydrochloric acid elution and direct determination by Flame Atomic Absorption Spectrometry. The flow system was operated in a time-based mode. Chemical and flow variables were studied. Results demonstrated that sample solutions containing cadmium(II) in the range of concentration from 0.91 to 30.00 μg l−1, pH between 6.50 and 9.25 could be determinated by this procedure, in a preconcentration time of 1 min. Flow rates in preconcentration and elution steps were 7.00 and 4.00 ml min−1, respectively. The precision of the preconcentration procedure (evaluated as standard deviation of solutions containing 1.0–30.0 μg l−1 of cadmium) varied in the range from 5 to 1%. The preconcentration factor, calculated as the ratio of the linear section of the slopes of the analytical curves before and after preconcentration, was 41, for a volume sample of 7.00 ml. The detection limit was 0.27 μg l−1 for a preconcentration time of 1 min. The proposed procedure was applied for determination of cadmium in biological reference materials. Achieved results demonstrated that the procedure can be applied for analysis of biological materials with satisfactory accuracy.Submitted by Texeira Ana (atanateixeira@gmail.com) on 2012-12-03T20:52:14Z No. of bitstreams: 1 Lemos.pdf: 103982 bytes, checksum: 38778b5734ac781e4badf0a170934907 (MD5)Made available in DSpace on 2012-12-03T20:52:15Z (GMT). No. of bitstreams: 1 Lemos.pdf: 103982 bytes, checksum: 38778b5734ac781e4badf0a170934907 (MD5) Previous issue date: 2000-09Elsevierhttp://dx.doi.org/10.1016/S0584-8547(00)00257-3reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBACadmiumOn-line preconcentrationPolyurethane foamFlame AASApplication of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAASSpectrochimica acta part B: atomic spectroscopyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINALLemos.pdfLemos.pdfapplication/pdf103982https://repositorio.ufba.br/bitstream/ri/7308/1/Lemos.pdf38778b5734ac781e4badf0a170934907MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/7308/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTLemos.pdf.txtLemos.pdf.txtExtracted texttext/plain21179https://repositorio.ufba.br/bitstream/ri/7308/3/Lemos.pdf.txt9d1271e3579beedcd50e1ef0ab54d563MD53ri/73082022-10-13 10:32:06.989oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-10-13T13:32:06Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
dc.title.alternative.pt_BR.fl_str_mv Spectrochimica acta part B: atomic spectroscopy
title Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
spellingShingle Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
Lemos, Valfredo Azevedo
Cadmium
On-line preconcentration
Polyurethane foam
Flame AAS
title_short Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
title_full Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
title_fullStr Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
title_full_unstemmed Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
title_sort Application of polyurethane foam loaded with BTAC in an on-line preconcentration system: cadmium determination by FAAS
author Lemos, Valfredo Azevedo
author_facet Lemos, Valfredo Azevedo
Santelli, Ricardo Erthal
Carvalho, Marcelo Souza de
Ferreira, Sergio Luis Costa
author_role author
author2 Santelli, Ricardo Erthal
Carvalho, Marcelo Souza de
Ferreira, Sergio Luis Costa
author2_role author
author
author
dc.contributor.author.fl_str_mv Lemos, Valfredo Azevedo
Santelli, Ricardo Erthal
Carvalho, Marcelo Souza de
Ferreira, Sergio Luis Costa
Lemos, Valfredo Azevedo
Santelli, Ricardo Erthal
Carvalho, Marcelo Souza de
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv Cadmium
On-line preconcentration
Polyurethane foam
Flame AAS
topic Cadmium
On-line preconcentration
Polyurethane foam
Flame AAS
description p.1497–1502
publishDate 2000
dc.date.issued.fl_str_mv 2000
dc.date.accessioned.fl_str_mv 2012-12-03T20:52:15Z
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/7308
dc.identifier.issn.none.fl_str_mv 0584-8547
dc.identifier.number.pt_BR.fl_str_mv v. 55, n. 9
identifier_str_mv 0584-8547
v. 55, n. 9
url http://www.repositorio.ufba.br/ri/handle/ri/7308
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/S0584-8547(00)00257-3
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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