Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples

Detalhes bibliográficos
Autor(a) principal: Lemos, Valfredo Azevedo
Data de Publicação: 2008
Outros Autores: Baliza, Patrícia Xavier, Carvalho, Anaildes Lago de, Oliveira, Rafael Vasconcelos, Teixeira, Leonardo Sena Gomes, Bezerra, Marcos de Almeida
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6021
Resumo: Acesso restrito: Texto completo. p. 388-393
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spelling Lemos, Valfredo AzevedoBaliza, Patrícia XavierCarvalho, Anaildes Lago deOliveira, Rafael VasconcelosTeixeira, Leonardo Sena GomesBezerra, Marcos de AlmeidaLemos, Valfredo AzevedoBaliza, Patrícia XavierCarvalho, Anaildes Lago deOliveira, Rafael VasconcelosTeixeira, Leonardo Sena GomesBezerra, Marcos de Almeida2012-05-31T13:34:14Z20080039-9140http://www.repositorio.ufba.br/ri/handle/ri/6021v. 77, n. 1Acesso restrito: Texto completo. p. 388-393A preconcentration method for manganese determination by sequential injection cloud point extraction with subsequent detection by flame atomic absorption spectrometry (FAAS) has been developed. The enrichment of Mn was performed after a preliminary on-line cloud point extraction and entrapment of manganese-containing surfactant aggregated within a minicolumn packed with cotton. The laboratory-made reagent 4-(5′-bromo-2′-thiazolylazo)orcinol (Br-TAO) and the surfactant Triton X-114 were used for cloud point extraction. The manganese ions were eluted with sulphuric acid solution and directly introduced into the FAAS. Chemical and flow variables affecting the preconcentration were studied. Using a sample volume of 2.80 mL the limit of detection and enrichment factor were calculated to be 0.5 μg L−1 and 14, respectively. The sample frequency is 48 h−1, considering a total run cycle of 75 s. The accuracy of the proposed method has been demonstrated by the analysis of the certified reference biological materials rice flour and tomato leaves. The method has been applied to determination of manganese in food samples.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-05-31T13:34:14Z No. of bitstreams: 1 __ac.els-cdn.com_S003991...0ece1a68233d2c216dc4d7a57baff.pdf: 169198 bytes, checksum: 8643fcec8cafb45fde255da311225647 (MD5)Made available in DSpace on 2012-05-31T13:34:14Z (GMT). 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dc.title.pt_BR.fl_str_mv Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
dc.title.alternative.pt_BR.fl_str_mv Talanta
title Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
spellingShingle Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
Lemos, Valfredo Azevedo
Manganese
Cloud point extraction
Sequential injection
Br-TAO
Preconcentration
title_short Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
title_full Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
title_fullStr Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
title_full_unstemmed Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
title_sort Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples
author Lemos, Valfredo Azevedo
author_facet Lemos, Valfredo Azevedo
Baliza, Patrícia Xavier
Carvalho, Anaildes Lago de
Oliveira, Rafael Vasconcelos
Teixeira, Leonardo Sena Gomes
Bezerra, Marcos de Almeida
author_role author
author2 Baliza, Patrícia Xavier
Carvalho, Anaildes Lago de
Oliveira, Rafael Vasconcelos
Teixeira, Leonardo Sena Gomes
Bezerra, Marcos de Almeida
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Lemos, Valfredo Azevedo
Baliza, Patrícia Xavier
Carvalho, Anaildes Lago de
Oliveira, Rafael Vasconcelos
Teixeira, Leonardo Sena Gomes
Bezerra, Marcos de Almeida
Lemos, Valfredo Azevedo
Baliza, Patrícia Xavier
Carvalho, Anaildes Lago de
Oliveira, Rafael Vasconcelos
Teixeira, Leonardo Sena Gomes
Bezerra, Marcos de Almeida
dc.subject.por.fl_str_mv Manganese
Cloud point extraction
Sequential injection
Br-TAO
Preconcentration
topic Manganese
Cloud point extraction
Sequential injection
Br-TAO
Preconcentration
description Acesso restrito: Texto completo. p. 388-393
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-05-31T13:34:14Z
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/6021
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 77, n. 1
identifier_str_mv 0039-9140
v. 77, n. 1
url http://www.repositorio.ufba.br/ri/handle/ri/6021
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/j.talanta.2008.06.046
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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