Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples

Detalhes bibliográficos
Autor(a) principal: Santos, Walter Nei Lopes dos
Data de Publicação: 2013
Outros Autores: Cavalcante, Dannuza D., Macedo, Samuel Marques, Nogueira, Jéssica S., Silva, Erik Galvão Paranhos da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/17234
Resumo: Texto completo: acesso restrito. p.1128-1132
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spelling Santos, Walter Nei Lopes dosCavalcante, Dannuza D.Macedo, Samuel MarquesNogueira, Jéssica S.Silva, Erik Galvão Paranhos da2015-03-23T13:24:21Z20131936-9751http://repositorio.ufba.br/ri/handle/ri/17234v. 6, n. 4Texto completo: acesso restrito. p.1128-1132This paper proposes a procedure for the determination of total arsenic in rice using slurry sampling and hydride generation atomic fluorescence spectrometry (HG AFS). During optimization, water, hydrochloric acid, and nitric acid solutions were tested as extractor. Best results were found using 2.0 mol L−1 nitric acid solutions. The slurries are prepared using 200 mg of rice sample, 5.0 mL of nitric acid solution, and sonication for 30 min. Then, an aliquot of 5.0 mL of the slurry was taken and 3.0 mL of 1.5 mol L−1 hydrochloric acid solution and 1.5 mL of 10 % potassium iodide in 2 % ascorbic acid solution were added. After 30 min, the volume was completed up to 10 mL with ultra-pure water and arsenic quantified by HG AFS. In these experimental conditions, the method allows the determination of arsenic employing external calibration, with limits of detection and quantification of 1.1 and 3.3 ng g−1 and precision expressed as relative standard deviation (%RSD) varying between 5.9 and 1.3 % for arsenic concentration of 0.12 and 0.47 μg g−1. Accuracy was confirmed by analysis of the NIES standard reference material for rice flour, SRM 10b. This method was used to determine the arsenic content in 20 rice samples that were purchased at supermarkets in Salvador, Bahia, Brazil. The arsenic content for the three types of rice (white, parboiled, and brown) varied from 0.12 and 0.47 μg g−1. Some of the samples were also analyzed by HG AFS after complete mineralization in block digester employing a reflux system (cold finger). A statistical test showed that there was no significant difference between the results obtained using slurry sampling and those obtained after complete digestion of the sample.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2015-03-23T13:24:21Z No. of bitstreams: 1 Walter N. L. dos Santos.pdf: 138345 bytes, checksum: a3711fb85e7828413ceb554f9d4daa0d (MD5)Made available in DSpace on 2015-03-23T13:24:21Z (GMT). No. of bitstreams: 1 Walter N. L. dos Santos.pdf: 138345 bytes, checksum: a3711fb85e7828413ceb554f9d4daa0d (MD5) Previous issue date: 2013http://dx.doi.org/10.1007/s12161-012-9519-yreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBARiceArsenicSlurry samplingHG AFSCold fingerSlurry Sampling and HG AFS for the Determination of Total Arsenic in Rice SamplesFood Analytical Methodsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALWalter N. 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dc.title.pt_BR.fl_str_mv Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
dc.title.alternative.pt_BR.fl_str_mv Food Analytical Methods
title Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
spellingShingle Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
Santos, Walter Nei Lopes dos
Rice
Arsenic
Slurry sampling
HG AFS
Cold finger
title_short Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
title_full Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
title_fullStr Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
title_full_unstemmed Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
title_sort Slurry Sampling and HG AFS for the Determination of Total Arsenic in Rice Samples
author Santos, Walter Nei Lopes dos
author_facet Santos, Walter Nei Lopes dos
Cavalcante, Dannuza D.
Macedo, Samuel Marques
Nogueira, Jéssica S.
Silva, Erik Galvão Paranhos da
author_role author
author2 Cavalcante, Dannuza D.
Macedo, Samuel Marques
Nogueira, Jéssica S.
Silva, Erik Galvão Paranhos da
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Santos, Walter Nei Lopes dos
Cavalcante, Dannuza D.
Macedo, Samuel Marques
Nogueira, Jéssica S.
Silva, Erik Galvão Paranhos da
dc.subject.por.fl_str_mv Rice
Arsenic
Slurry sampling
HG AFS
Cold finger
topic Rice
Arsenic
Slurry sampling
HG AFS
Cold finger
description Texto completo: acesso restrito. p.1128-1132
publishDate 2013
dc.date.issued.fl_str_mv 2013
dc.date.accessioned.fl_str_mv 2015-03-23T13:24:21Z
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/17234
dc.identifier.issn.none.fl_str_mv 1936-9751
dc.identifier.number.pt_BR.fl_str_mv v. 6, n. 4
identifier_str_mv 1936-9751
v. 6, n. 4
url http://repositorio.ufba.br/ri/handle/ri/17234
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/s12161-012-9519-y
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
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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