Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS

Detalhes bibliográficos
Autor(a) principal: Brandão, Geovani Cardoso
Data de Publicação: 2012
Outros Autores: Gomes, Dalita Pedrosa, Matos, Geraldo Domingues
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/15475
Resumo: Texto completo: acesso restrito. p. 579-584
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spelling Brandão, Geovani CardosoGomes, Dalita PedrosaMatos, Geraldo DominguesBrandão, Geovani CardosoGomes, Dalita PedrosaMatos, Geraldo Domingues2014-08-05T11:50:37Z2012http://repositorio.ufba.br/ri/handle/ri/15475v. 5, n. 3Texto completo: acesso restrito. p. 579-584The use of slurry sampling as the procedure for sample preparation provides simplicity, speed, and low consumption of reagents in analytical methods. In this paper, a method based on slurry sampling for the determination of iron in samples of fortified milk powder by high-resolution continuum source flame atomic absorption spectrometry was developed. Multivariate design techniques were applied for the optimization of experimental conditions of the method for a sample mass of 100 mg, final volume of slurry of 10 mL, and using the absorbance signal as response. Initially, a two-level full factorial design was used for the preliminary evaluation of the variables involved in slurry preparation: concentration hydrochloric acid, Triton X-100 concentration, and sonication time. Then, the Doehlert matrix was applied for the determination of the critical conditions: 2.5 mol L−1 hydrochloric acid and sonication time of 20 min. External calibration technique with aqueous standard was used for the quantification of iron. This way, the method allowed iron determination with limits of detection and quantification of 0.9 and 3.0 μg g−1, respectively. The precision expressed as the relative standard deviation was evaluated under repeatability and reproducibility conditions, being 3.2% and 4.0%, respectively. Addition/recovery test was used for assessing the accuracy of the method, and the recovery values achieved were in the range of 90–110%. The method was applied for iron determination in eight samples of fortified milk powder, and the obtained concentrations varied from 95.4 to 295.6 μg g−1. The results were compared with those obtained after acid digestion, and no significant difference was observed applying t test at the 95% confidence level.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-08-05T11:50:37Z No. of bitstreams: 1 Geovani Cardoso Brandão.pdf: 201200 bytes, checksum: ba547dc18debbe989134c3a1bf38ea8a (MD5)Made available in DSpace on 2014-08-05T11:50:37Z (GMT). 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dc.title.pt_BR.fl_str_mv Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
dc.title.alternative.pt_BR.fl_str_mv Food Analytical Methods
title Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
spellingShingle Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
Brandão, Geovani Cardoso
Slurry sampling
Iron determination
Fortified milk powder
Multivariate optimization
HR-CS FAAS
title_short Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
title_full Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
title_fullStr Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
title_full_unstemmed Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
title_sort Development of an Analytical Method Based in the Slurry Sampling for Iron Determination in Fortified Milk Powder by HR-CS FAAS
author Brandão, Geovani Cardoso
author_facet Brandão, Geovani Cardoso
Gomes, Dalita Pedrosa
Matos, Geraldo Domingues
author_role author
author2 Gomes, Dalita Pedrosa
Matos, Geraldo Domingues
author2_role author
author
dc.contributor.author.fl_str_mv Brandão, Geovani Cardoso
Gomes, Dalita Pedrosa
Matos, Geraldo Domingues
Brandão, Geovani Cardoso
Gomes, Dalita Pedrosa
Matos, Geraldo Domingues
dc.subject.por.fl_str_mv Slurry sampling
Iron determination
Fortified milk powder
Multivariate optimization
HR-CS FAAS
topic Slurry sampling
Iron determination
Fortified milk powder
Multivariate optimization
HR-CS FAAS
description Texto completo: acesso restrito. p. 579-584
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2014-08-05T11:50:37Z
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://repositorio.ufba.br/ri/handle/ri/15475
dc.identifier.number.pt_BR.fl_str_mv v. 5, n. 3
url http://repositorio.ufba.br/ri/handle/ri/15475
identifier_str_mv v. 5, n. 3
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/s12161-011-9282-5
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
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