Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS

Detalhes bibliográficos
Autor(a) principal: Ferreira, Adriana C.
Data de Publicação: 2004
Outros Autores: Korn, Maria das Graças Andrade, 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/7321
Resumo: Texto completo: acesso restrito . p. 271-278
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spelling Ferreira, Adriana C.Korn, Maria das Graças AndradeFerreira, Sergio Luis CostaFerreira, Adriana C.Korn, Maria das Graças AndradeFerreira, Sergio Luis Costa2012-12-07T14:30:37Z20040026-3672http://www.repositorio.ufba.br/ri/handle/ri/7321v. 146, n. 3-4Texto completo: acesso restrito . p. 271-278In the present paper, a preconcentration procedure for manganese determination in seawater samples by flame atomic absorption spectrometry (FAAS) is proposed. It is based on the solid phase extraction of manganese(II) ions as a 4-(2-pyridylazo-resorcinol) (PAR) chelate using activated carbon as sorbent. Optimization of the experimental parameters (pH, activated carbon mass, PAR mass and shaking time) was carried out using a two-level full factorial design (24) and two Doehlert matrix designs. The results of the factorial design, considering the analysis of variance (ANOVA), demonstrate that all these factors and their interactions (pH × PAR mass; pH × activated carbon mass and activated carbon mass × shaking time) are statistically significant. Final optimization was carried out using Doehlert matrix designs considering the results of the factorial design. The validation process evaluated the following parameters: effect of other metal ions, calibration curve, precision, accuracy and robustness. The procedure allows manganese determination in seawater samples with limits of detection (3σ/S) and quantification (10σ/S) of 16 ng L−1 and 53 ng L−1 respectively, and a preconcentration factor of 152. The analysis of certified reference materials demonstrated that the proposed procedure can also be used for manganese determination in biological samples. The procedure is not affected by matrix interferences and could be satisfactorily applied in manganese determination in seawater samples. Manganese determination in surface seawater samples collected from the shore of Salvador city, Brazil, was performed, and concentrations ranging from 0.51 to 2.59 µg L−1 were found.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-12-07T14:30:37Z No. of bitstreams: 1 art%3A10.1007%2Fs00604-004-0206-6.pdf: 400736 bytes, checksum: 288da093bf057ba9fc3b0622f30303ac (MD5)Made available in DSpace on 2012-12-07T14:30:37Z (GMT). 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dc.title.pt_BR.fl_str_mv Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
dc.title.alternative.pt_BR.fl_str_mv Microchimica Acta
title Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
spellingShingle Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
Ferreira, Adriana C.
Doehlert matrix
preconcentration
manganese
PAR
title_short Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
title_full Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
title_fullStr Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
title_full_unstemmed Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
title_sort Multivariate Optimization in Preconcentration Procedure for Manganese Determination in Seawater Samples by FAAS
author Ferreira, Adriana C.
author_facet Ferreira, Adriana C.
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
author_role author
author2 Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, Adriana C.
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
Ferreira, Adriana C.
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv Doehlert matrix
preconcentration
manganese
PAR
topic Doehlert matrix
preconcentration
manganese
PAR
description Texto completo: acesso restrito . p. 271-278
publishDate 2004
dc.date.issued.fl_str_mv 2004
dc.date.accessioned.fl_str_mv 2012-12-07T14:30:37Z
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/7321
dc.identifier.issn.none.fl_str_mv 0026-3672
dc.identifier.number.pt_BR.fl_str_mv v. 146, n. 3-4
identifier_str_mv 0026-3672
v. 146, n. 3-4
url http://www.repositorio.ufba.br/ri/handle/ri/7321
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/10.1007/s00604-004-0206-6
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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