Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils

Detalhes bibliográficos
Autor(a) principal: Silva, Thalita Oliveira da
Data de Publicação: 2008
Outros Autores: Pereira, Pedro Afonso de Paula
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6151
Resumo: Acesso restrito: Texto completo. p. 3129-3135.
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spelling Silva, Thalita Oliveira daPereira, Pedro Afonso de PaulaSilva, Thalita Oliveira daPereira, Pedro Afonso de Paula2012-06-14T19:12:54Z20080021-8561http://www.repositorio.ufba.br/ri/handle/ri/6151v. 56, n. 9Acesso restrito: Texto completo. p. 3129-3135.The aim of this work was to compare the emission rates of selected carbonyl compounds (CC) produced by palm and soybean oils when heated at 180 °C in the presence of air, through different time intervals and at different surface-to-volume ratios (S/V), in continuous and intermittent processes. The CC were collected and derivatized onto silica C18 cartridges impregnated with an acid 2,4- dinitrophenylhidrazine solution, followed by extraction with acetonitrile and analysis by HPLC-UV and,in some cases, HPLC-MS with electrospray ionization. Among the CC quantified, namely, acetaldehyde, acrolein, propanal, butanal, hexanal, 2-heptenal, and 2-octenal, acrolein was the main emission in both oils and all S/V ratios, followed by hexanal and 2-heptenal. The soybean oil has presented greater emission rates of acrolein than palm oil. When different S/V ratios used during the heating process of the oil were compared, the emission rates, in general, were directly related to them, although saturated and nonsaturated CC have had different behaviors toward oxidation reactions. During intermittent heating, there was a trend of increasing emission rates of saturated aldehydes, whereas the opposite was observed with unsaturated aldehydes, probably due to the reactivity of the double bond present in these compounds.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-06-14T19:12:54Z No. of bitstreams: 1 C__Documents and Settings_rep...t.default_Cache_2_46_CD7F0d01.pdf: 1599022 bytes, checksum: cf5268e0439b13465d76998fe78903bf (MD5)Made available in DSpace on 2012-06-14T19:12:54Z (GMT). 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dc.title.pt_BR.fl_str_mv Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
dc.title.alternative.pt_BR.fl_str_mv Journal of Agricultural and Food Chemistry
title Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
spellingShingle Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
Silva, Thalita Oliveira da
Palm and soybean oils
thermal oxidation
aldehyde emissions
HPLC
DAD
ESI-MS
title_short Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
title_full Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
title_fullStr Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
title_full_unstemmed Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
title_sort Influence of Time, Surface-to-Volume Ratio, and Heating Process (Continuous or Intermittent) on the Emission Rates of Selected Carbonyl Compounds during Thermal Oxidation of Palm and Soybean Oils
author Silva, Thalita Oliveira da
author_facet Silva, Thalita Oliveira da
Pereira, Pedro Afonso de Paula
author_role author
author2 Pereira, Pedro Afonso de Paula
author2_role author
dc.contributor.author.fl_str_mv Silva, Thalita Oliveira da
Pereira, Pedro Afonso de Paula
Silva, Thalita Oliveira da
Pereira, Pedro Afonso de Paula
dc.subject.por.fl_str_mv Palm and soybean oils
thermal oxidation
aldehyde emissions
HPLC
DAD
ESI-MS
topic Palm and soybean oils
thermal oxidation
aldehyde emissions
HPLC
DAD
ESI-MS
description Acesso restrito: Texto completo. p. 3129-3135.
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-06-14T19:12:54Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6151
dc.identifier.issn.none.fl_str_mv 0021-8561
dc.identifier.number.pt_BR.fl_str_mv v. 56, n. 9
identifier_str_mv 0021-8561
v. 56, n. 9
url http://www.repositorio.ufba.br/ri/handle/ri/6151
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.pt_BR.fl_str_mv http://pubs.acs.org/doi/pdf/10.1021/jf0734525
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