Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction

Detalhes bibliográficos
Autor(a) principal: Araujo, André R. T. S.
Data de Publicação: 2008
Outros Autores: Saraiva, Maria Lúcia M. F. S., Lima, José Luis Fontes da Costa, Korn, Maria das Graças Andrade
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6256
Resumo: Acesso restrito: Texto completo. p. 177-183
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spelling Araujo, André R. T. S.Saraiva, Maria Lúcia M. F. S.Lima, José Luis Fontes da CostaKorn, Maria das Graças AndradeAraujo, André R. T. S.Saraiva, Maria Lúcia M. F. S.Lima, José Luis Fontes da CostaKorn, Maria das Graças Andrade2012-06-28T19:45:17Z20080003-2670http://www.repositorio.ufba.br/ri/handle/ri/6256v. 613, n. 2Acesso restrito: Texto completo. p. 177-183A methodology based in flow analysis and membrane-based extraction has been applied to the determination of methanol in biodiesel samples. A hydrophilic membrane was used to perform the liquid–liquid extraction in the system with the organic sample fed to the donor side of the membrane and the methanol transfer to an aqueous acceptor buffer solution.The quantification of the methanol was then achieved in aqueous solution by the combined use of immobilised alcohol oxidase (AOD), soluble peroxidase and 2,2 -azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). The optimization of parameters such as the type of membrane, the groove volume and configuration of the membrane unit,the appropriate organic solvent, sample injection volume, as well as immobilised packed AOD reactor was performed. Two dynamic analytical working ranges were achieved, up to 0.015% and up to 0.200% (m/m) methanol concentrations, just by changing the volume of acceptor aqueous solution. Detection limits of 0.0002% (m/m) and 0.007% (m/m) methanol were estimated, respectively. The decision limit (CC ) and the detection capacity (CC ) were 0.206 and 0.211% (m/m), respectively. The developed methodology showed good precision, with a relative standard deviation (R.S.D.) <5.0% (n = 10). Biodiesel samples from different sources were then directly analyzed without any sample pre-treatment. Statistical evaluation showed good compliance, for a 95% confidence level, between the results obtained with the flow system and those furnished by the gas chromatography reference method.The proposed methodology turns out to be more environmental friendly and cost-effective than the reference method.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-06-28T19:45:17Z No. of bitstreams: 1 CONFIG~1....0-S0003267008004765-main.pdf: 154096 bytes, checksum: 061fe2aba9a0c4706aef9b7f364fc7b8 (MD5)Made available in DSpace on 2012-06-28T19:45:17Z (GMT). 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dc.title.pt_BR.fl_str_mv Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
dc.title.alternative.pt_BR.fl_str_mv Analytica Chimica ACTA
title Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
spellingShingle Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
Araujo, André R. T. S.
Biodiesel
Methanol
Membrane-based extraction
Immobilised enzyme
Flow analysis
title_short Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
title_full Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
title_fullStr Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
title_full_unstemmed Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
title_sort Flow methodology for methanol determination in biodiesel exploiting membrane-based extraction
author Araujo, André R. T. S.
author_facet Araujo, André R. T. S.
Saraiva, Maria Lúcia M. F. S.
Lima, José Luis Fontes da Costa
Korn, Maria das Graças Andrade
author_role author
author2 Saraiva, Maria Lúcia M. F. S.
Lima, José Luis Fontes da Costa
Korn, Maria das Graças Andrade
author2_role author
author
author
dc.contributor.author.fl_str_mv Araujo, André R. T. S.
Saraiva, Maria Lúcia M. F. S.
Lima, José Luis Fontes da Costa
Korn, Maria das Graças Andrade
Araujo, André R. T. S.
Saraiva, Maria Lúcia M. F. S.
Lima, José Luis Fontes da Costa
Korn, Maria das Graças Andrade
dc.subject.por.fl_str_mv Biodiesel
Methanol
Membrane-based extraction
Immobilised enzyme
Flow analysis
topic Biodiesel
Methanol
Membrane-based extraction
Immobilised enzyme
Flow analysis
description Acesso restrito: Texto completo. p. 177-183
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-06-28T19:45:17Z
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://www.repositorio.ufba.br/ri/handle/ri/6256
dc.identifier.issn.none.fl_str_mv 0003-2670
dc.identifier.number.pt_BR.fl_str_mv v. 613, n. 2
identifier_str_mv 0003-2670
v. 613, n. 2
url http://www.repositorio.ufba.br/ri/handle/ri/6256
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.aca.2008.03.005
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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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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