Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://repositorio.ufba.br/ri/handle/ri/14064 |
Resumo: | Texto completo: acesso restrito. p. 295–303 |
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Ferreira, Sergio Luis CostaBezerra, Marcos de AlmeidaSantos, Walter Nei Lopes dosBarros Neto, Benício deFerreira, Sergio Luis CostaBezerra, Marcos de AlmeidaSantos, Walter Nei Lopes dosBarros Neto, Benício de2013-12-10T11:35:34Z20030039-9140http://repositorio.ufba.br/ri/handle/ri/14064v. 61, n. 3Texto completo: acesso restrito. p. 295–303In the present paper, a system for on-line preconcentration and determination of copper by flame atomic absorption spectrometry (FAAS) was developed. It was based on solid phase extraction of copper(II) ions on a minicolumn of Amberlite XAD-2 loaded with 2-(2-thiazolylazo)-5-dimethylaminophenol (TAM). The optimisation process was carried out using Doehlert designs. Four variables (sampling flow rate, SR; elution flow rate, buffer concentration, BC; and pH) were regarded as factors in the optimisation. The parameter “sensitivity efficiency (SE)” proposed in this paper, and defined as the analytical signal obtained for an on-line enrichment system for a preconcentration time of 1 min was used as analytical response in the optimisation process. Using the established experimental conditions, the proposed on-line system allowed determination of copper with detection limit (3σ/S) of 0.23 μg l−1, and a precision (repeatability), calculated as relative standard deviation (R.S.D.) of 3.9 and 3.7% for copper concentration of 5.00 and 20.00 μg l−1, respectively. The preconcentration factor obtained is 62. The recovery achieved for copper determination in presence of several cations demonstrated that this has enough selectivity for analysis of food samples. The robustness of the proposed system was also evaluated. The accuracy was confirmed by analysis of the following certified reference materials (CRMs): Rice flour NIES 10a, Spinach leaves NIST 1570a, Apples leaves NIST 1515 and Orchard leaves NBS 1571. This procedure was applied for copper determination in natural food samples.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-12-10T11:35:33Z No. of bitstreams: 1 Sérgio L.C. Ferreira.pdf: 314669 bytes, checksum: 41a7bc7b9ac1e63b67a71182e8a31135 (MD5)Made available in DSpace on 2013-12-10T11:35:34Z (GMT). No. of bitstreams: 1 Sérgio L.C. Ferreira.pdf: 314669 bytes, checksum: 41a7bc7b9ac1e63b67a71182e8a31135 (MD5) Previous issue date: 2003http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/S0039-9140(03)00277-7reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBADoehlert designsCopperFlame atomic absorption spectrometryApplication of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometryTalantainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALSérgio L.C. Ferreira.pdfSérgio L.C. Ferreira.pdfapplication/pdf314669https://repositorio.ufba.br/bitstream/ri/14064/1/S%c3%a9rgio%20L.C.%20Ferreira.pdf41a7bc7b9ac1e63b67a71182e8a31135MD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/14064/2/license.txtff6eaa8b858ea317fded99f125f5fcd0MD52TEXTSérgio L.C. Ferreira.pdf.txtSérgio L.C. 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dc.title.pt_BR.fl_str_mv |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
dc.title.alternative.pt_BR.fl_str_mv |
Talanta |
title |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
spellingShingle |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry Ferreira, Sergio Luis Costa Doehlert designs Copper Flame atomic absorption spectrometry |
title_short |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
title_full |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
title_fullStr |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
title_full_unstemmed |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
title_sort |
Application of Doehlert designs for optimisation of an on-line preconcentration system for copper determination by flame atomic absorption spectrometry |
author |
Ferreira, Sergio Luis Costa |
author_facet |
Ferreira, Sergio Luis Costa Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Barros Neto, Benício de |
author_role |
author |
author2 |
Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Barros Neto, Benício de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ferreira, Sergio Luis Costa Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Barros Neto, Benício de Ferreira, Sergio Luis Costa Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Barros Neto, Benício de |
dc.subject.por.fl_str_mv |
Doehlert designs Copper Flame atomic absorption spectrometry |
topic |
Doehlert designs Copper Flame atomic absorption spectrometry |
description |
Texto completo: acesso restrito. p. 295–303 |
publishDate |
2003 |
dc.date.issued.fl_str_mv |
2003 |
dc.date.accessioned.fl_str_mv |
2013-12-10T11:35:34Z |
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://repositorio.ufba.br/ri/handle/ri/14064 |
dc.identifier.issn.none.fl_str_mv |
0039-9140 |
dc.identifier.number.pt_BR.fl_str_mv |
v. 61, n. 3 |
identifier_str_mv |
0039-9140 v. 61, n. 3 |
url |
http://repositorio.ufba.br/ri/handle/ri/14064 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.source.pt_BR.fl_str_mv |
http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/S0039-9140(03)00277-7 |
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reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
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Universidade Federal da Bahia (UFBA) |
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UFBA |
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UFBA |
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Repositório Institucional da UFBA |
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Repositório Institucional da UFBA |
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