Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry

Detalhes bibliográficos
Autor(a) principal: Brandão, Geovani Cardoso
Data de Publicação: 2012
Outros Autores: Aureliano, Márcio de Oliveira, Sauthier, Maria Celeste da Silva, Santos, Walter Nei Lopes dos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/15647
Resumo: p. 855–858
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spelling Brandão, Geovani CardosoAureliano, Márcio de OliveiraSauthier, Maria Celeste da SilvaSantos, Walter Nei Lopes dos2014-08-19T14:26:21Z2014-08-19T14:26:21Z20121759-9660http://repositorio.ufba.br/ri/handle/ri/15647v. 4, n. 3p. 855–858The present work proposes the photo-oxidation using UV radiation/H2O2 as an alternative procedure for pretreatment of industrialized fruit juice samples for determination of copper by flame atomic absorption spectrometry (FAAS). For optimization of the photo-oxidation procedure the following variables were studied: pH and volume of buffer solution, volume of concentrated hydrogen peroxide and irradiation time. The sample degradation was monitored by molecular absorption spectrometry in the spectral range of 200–800 nm. The established conditions were: pH 10, volume of buffer of 1.0 mL, volume of concentrated hydrogen peroxide of 1.5 mL and irradiation time of 90 min, for a 5 mL volume of the photo-digested sample. An external calibration technique with aqueous standard was used for copper quantification. Under these conditions, the method allows the copper determination with limits of detection and quantification of 7 and 22 μg L−1, respectively. The precision, expressed as relative standard deviation (RSD), was 1.43 and 0.27% for copper concentrations of 0.2 and 2.0 μg mL−1, respectively. The accuracy of the method was evaluated for five industrialized fruit juice samples (orange, grape, mango, passion fruit and peach) and the results compared with those obtained after acid digestion of the samples and determination by FAAS. No significant difference was observed between the results obtained by both procedures, applying a paired t-test at the 95% confidence level.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-08-19T14:26:21Z No. of bitstreams: 1 Geovani C. Brandão.pdf: 173455 bytes, checksum: 9499fa8cd6cb4da3c9cc025742ce93fd (MD5)Made available in DSpace on 2014-08-19T14:26:21Z (GMT). No. of bitstreams: 1 Geovani C. Brandão.pdf: 173455 bytes, checksum: 9499fa8cd6cb4da3c9cc025742ce93fd (MD5) Previous issue date: 2012http://dx.doi.org/ 10.1039/C2AY05438Hreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAPhoto-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometryAnalytical Methodsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBrasilinfo:eu-repo/semantics/openAccessengORIGINALGeovani C. Brandão.pdfGeovani C. 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dc.title.pt_BR.fl_str_mv Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
dc.title.alternative.pt_BR.fl_str_mv Analytical Methods
title Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
spellingShingle Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
Brandão, Geovani Cardoso
title_short Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
title_full Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
title_fullStr Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
title_full_unstemmed Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
title_sort Photo-oxidation using UV radiation as a sample preparation procedure for the determination of copper in fruit juices by flame atomic absorption spectrometry
author Brandão, Geovani Cardoso
author_facet Brandão, Geovani Cardoso
Aureliano, Márcio de Oliveira
Sauthier, Maria Celeste da Silva
Santos, Walter Nei Lopes dos
author_role author
author2 Aureliano, Márcio de Oliveira
Sauthier, Maria Celeste da Silva
Santos, Walter Nei Lopes dos
author2_role author
author
author
dc.contributor.author.fl_str_mv Brandão, Geovani Cardoso
Aureliano, Márcio de Oliveira
Sauthier, Maria Celeste da Silva
Santos, Walter Nei Lopes dos
description p. 855–858
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2014-08-19T14:26:21Z
dc.date.available.fl_str_mv 2014-08-19T14:26:21Z
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/15647
dc.identifier.issn.none.fl_str_mv 1759-9660
dc.identifier.number.pt_BR.fl_str_mv v. 4, n. 3
identifier_str_mv 1759-9660
v. 4, n. 3
url http://repositorio.ufba.br/ri/handle/ri/15647
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.publisher.country.fl_str_mv Brasil
dc.source.pt_BR.fl_str_mv http://dx.doi.org/ 10.1039/C2AY05438H
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