Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design

Detalhes bibliográficos
Autor(a) principal: Maranhão, Tatiane de A.
Data de Publicação: 2007
Outros Autores: Martendal, Edmar, Borges, Daniel L. G., Carasek, Eduardo, Welz, Bernhard, Curtius, Adilson José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/14392
Resumo: Texto completo: acesso restrito. p. 1019-1027
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spelling Maranhão, Tatiane de A.Martendal, EdmarBorges, Daniel L. G.Carasek, EduardoWelz, BernhardCurtius, Adilson JoséMaranhão, Tatiane de A.Martendal, EdmarBorges, Daniel L. G.Carasek, EduardoWelz, BernhardCurtius, Adilson José2014-01-20T15:48:11Z20070584-8547http://repositorio.ufba.br/ri/handle/ri/14392v. 62, n. 9Texto completo: acesso restrito. p. 1019-1027Cloud point extraction (CPE) is proposed as a pre-concentration procedure for the determination of Pb and Cd in undigested urine by graphite furnace atomic absorption spectrometry (GF AAS). Aliquots of 0.5 mL urine were acidified with HCl and the chelating agent ammonium O,O-diethyl dithiophosphate (DDTP) was added along with the non-ionic surfactant Triton X-114 at the optimized concentrations. Phase separation was achieved by heating the mixture to 50 °C for 15 min. The surfactant-rich phase was analyzed by GF AAS, employing the optimized pyrolysis temperatures of 900 °C for Pb and 800 °C for Cd, using a graphite tube with a platform treated with 500 μg Ru as permanent modifier. The reagent concentrations for CPE (HCl, DDTP and Triton X-114) were optimized using a Box–Behnken design. The response surfaces and the optimum values were very similar for aqueous solutions and for the urine samples, demonstrating that aqueous standards submitted to CPE could be used for calibration. Detection limits of 40 and 2 ng L− 1 for Pb and Cd, respectively, were obtained along with an enhancement factor of 16 for both analytes. Three control urine samples were analyzed using this approach, and good agreement was obtained at a 95% statistical confidence level between the certified and determined values. Five real samples have also been analyzed before and after spiking with Pb and Cd, resulting in recoveries ranging from 97 to 118%.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2014-01-20T15:48:11Z No. of bitstreams: 1 1-s2.0-S0584854707001589-main.pdf: 1436145 bytes, checksum: 55eecc502bb546dd9f82f25a8512606e (MD5)Made available in DSpace on 2014-01-20T15:48:11Z (GMT). No. of bitstreams: 1 1-s2.0-S0584854707001589-main.pdf: 1436145 bytes, checksum: 55eecc502bb546dd9f82f25a8512606e (MD5) Previous issue date: 2007http://dx.doi.org/10.1016/j.sab.2007.05.008reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBACloud point extractionGraphite furnace atomic absorption spectrometryUrineCadmium determinationLead determinationPermanent modifierCloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken designSpectrochimica Acta Part B: Atomic Spectroscopyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINAL1-s2.0-S0584854707001589-main.pdf1-s2.0-S0584854707001589-main.pdfapplication/pdf1436145https://repositorio.ufba.br/bitstream/ri/14392/1/1-s2.0-S0584854707001589-main.pdf55eecc502bb546dd9f82f25a8512606eMD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/14392/2/license.txtff6eaa8b858ea317fded99f125f5fcd0MD52TEXT1-s2.0-S0584854707001589-main.pdf.txt1-s2.0-S0584854707001589-main.pdf.txtExtracted texttext/plain37911https://repositorio.ufba.br/bitstream/ri/14392/3/1-s2.0-S0584854707001589-main.pdf.txtf5417431696cc2a9723d3354e8e3fa0dMD53ri/143922022-07-05 14:03:13.415oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:13Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
dc.title.alternative.pt_BR.fl_str_mv Spectrochimica Acta Part B: Atomic Spectroscopy
title Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
spellingShingle Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
Maranhão, Tatiane de A.
Cloud point extraction
Graphite furnace atomic absorption spectrometry
Urine
Cadmium determination
Lead determination
Permanent modifier
title_short Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
title_full Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
title_fullStr Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
title_full_unstemmed Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
title_sort Cloud point extraction for the determination of lead and cadmium in urine by graphite furnace atomic absorption spectrometry with multivariate optimization using Box–Behnken design
author Maranhão, Tatiane de A.
author_facet Maranhão, Tatiane de A.
Martendal, Edmar
Borges, Daniel L. G.
Carasek, Eduardo
Welz, Bernhard
Curtius, Adilson José
author_role author
author2 Martendal, Edmar
Borges, Daniel L. G.
Carasek, Eduardo
Welz, Bernhard
Curtius, Adilson José
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Maranhão, Tatiane de A.
Martendal, Edmar
Borges, Daniel L. G.
Carasek, Eduardo
Welz, Bernhard
Curtius, Adilson José
Maranhão, Tatiane de A.
Martendal, Edmar
Borges, Daniel L. G.
Carasek, Eduardo
Welz, Bernhard
Curtius, Adilson José
dc.subject.por.fl_str_mv Cloud point extraction
Graphite furnace atomic absorption spectrometry
Urine
Cadmium determination
Lead determination
Permanent modifier
topic Cloud point extraction
Graphite furnace atomic absorption spectrometry
Urine
Cadmium determination
Lead determination
Permanent modifier
description Texto completo: acesso restrito. p. 1019-1027
publishDate 2007
dc.date.issued.fl_str_mv 2007
dc.date.accessioned.fl_str_mv 2014-01-20T15:48:11Z
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/14392
dc.identifier.issn.none.fl_str_mv 0584-8547
dc.identifier.number.pt_BR.fl_str_mv v. 62, n. 9
identifier_str_mv 0584-8547
v. 62, n. 9
url http://repositorio.ufba.br/ri/handle/ri/14392
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.sab.2007.05.008
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)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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