Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products

Detalhes bibliográficos
Autor(a) principal: Rebouças, Márcio das Virgens
Data de Publicação: 2005
Outros Autores: Ferreira, Sergio Luis Costa, Barros Neto, Benicio de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13625
Resumo: Texto completo: acesso restrito.p.195–204
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spelling Rebouças, Márcio das VirgensFerreira, Sergio Luis CostaBarros Neto, Benicio deRebouças, Márcio das VirgensFerreira, Sergio Luis CostaBarros Neto, Benicio de2013-11-13T15:16:01Z20050039-9140http://repositorio.ufba.br/ri/handle/ri/13625v.67 n. 1Texto completo: acesso restrito.p.195–204Most comparative studies on the efficiency of chemical modifiers have been conducted in aqueous media. In the present work, we proposed a detailed study of the use of different chemical modifiers for direct determination of arsenic in complex organic matrices by electrothermal atomic absorption spectrometry (ETAAS). Palladium, rhodium, tungsten, silver, lanthanum and a mixture of palladium and magnesium were tested. The figures of merit used for evaluation and comparison were acquired in the optimal conditions for each modifier, established by multivariate optimization of the main variables based on Doehlert designs. Singular features were observed for the chemical behaviour of some modifiers in organic matrices compared to aqueous media, such as the worse performance of Pd + Mg modifier and no notice of severe tube corrosion from La application. Lanthanum was chosen as the best chemical modifier for the present application, according to predefined criteria. Lanthanum showed the minimum limit of detection, characteristic concentration and blank signal among all tested species and no effect of the concomitants usually present in petrochemical feedstocks. Using a 200 mg L−1 lanthanum solution as a chemical modifier, the average relative standard deviations of 7 and 16% (at 3–15 μg L−1 level) and characteristic concentrations of 0.47 and 0.77 μg L−1 for naphtha and petroleum condensates, respectively, were observed.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-11-13T15:16:01Z No. of bitstreams: 1 Marcio V. Reboucas.pdf: 248019 bytes, checksum: 4e66c06f0e119b95bfc1e5317264ec0c (MD5)Made available in DSpace on 2013-11-13T15:16:01Z (GMT). No. of bitstreams: 1 Marcio V. Reboucas.pdf: 248019 bytes, checksum: 4e66c06f0e119b95bfc1e5317264ec0c (MD5) Previous issue date: 2005http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.talanta.2005.02.014reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAChemical modifierArsenicNaphthaPetroleum condensateETAASDoehlertBehaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum productsTalantainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALMarcio V. Reboucas.pdfMarcio V. 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dc.title.pt_BR.fl_str_mv Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
dc.title.alternative.pt_BR.fl_str_mv Talanta
title Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
spellingShingle Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
Rebouças, Márcio das Virgens
Chemical modifier
Arsenic
Naphtha
Petroleum condensate
ETAAS
Doehlert
title_short Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
title_full Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
title_fullStr Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
title_full_unstemmed Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
title_sort Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products
author Rebouças, Márcio das Virgens
author_facet Rebouças, Márcio das Virgens
Ferreira, Sergio Luis Costa
Barros Neto, Benicio de
author_role author
author2 Ferreira, Sergio Luis Costa
Barros Neto, Benicio de
author2_role author
author
dc.contributor.author.fl_str_mv Rebouças, Márcio das Virgens
Ferreira, Sergio Luis Costa
Barros Neto, Benicio de
Rebouças, Márcio das Virgens
Ferreira, Sergio Luis Costa
Barros Neto, Benicio de
dc.subject.por.fl_str_mv Chemical modifier
Arsenic
Naphtha
Petroleum condensate
ETAAS
Doehlert
topic Chemical modifier
Arsenic
Naphtha
Petroleum condensate
ETAAS
Doehlert
description Texto completo: acesso restrito.p.195–204
publishDate 2005
dc.date.issued.fl_str_mv 2005
dc.date.accessioned.fl_str_mv 2013-11-13T15:16:01Z
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/13625
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v.67 n. 1
identifier_str_mv 0039-9140
v.67 n. 1
url http://repositorio.ufba.br/ri/handle/ri/13625
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.ez10.periodicos.capes.gov.br/10.1016/j.talanta.2005.02.014
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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reponame_str Repositório Institucional da UFBA
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