Vitaminas lipossolúveis em alimentos: uma abordagem analítica
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100020 |
Resumo: | This study concerns certain problems inherent to the determination of fat-soluble vitamins in food, from extraction methods to identification and quantification. The discussion involves the main official and unofficial extraction methods coupled with spectrophotometric and HPLC techniques in which vitamins samples are obtained through liquid-liquid-solid and liquid-liquid-solid-solid extraction, indispensable to the analytical separation of different chemical compounds with vitamin functions. A saponification stage, possibly coupled with supercritical fluid extraction appears to be mandatory in the determination of vitamins A and E in their alcoholic forms. Alternative identification and quantification procedures are outlined: biological and chemical assays, analytical separations by HPLC (normal and reversed-phase), UV detection (all fat-soluble vitamins) and fluorescence detection (retinoids and tocopherols). Automation from sample preparation to quantification stages increases the data acquisition rate. |
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Vitaminas lipossolúveis em alimentos: uma abordagem analíticafat-soluble vitaminsextractionquantificationThis study concerns certain problems inherent to the determination of fat-soluble vitamins in food, from extraction methods to identification and quantification. The discussion involves the main official and unofficial extraction methods coupled with spectrophotometric and HPLC techniques in which vitamins samples are obtained through liquid-liquid-solid and liquid-liquid-solid-solid extraction, indispensable to the analytical separation of different chemical compounds with vitamin functions. A saponification stage, possibly coupled with supercritical fluid extraction appears to be mandatory in the determination of vitamins A and E in their alcoholic forms. Alternative identification and quantification procedures are outlined: biological and chemical assays, analytical separations by HPLC (normal and reversed-phase), UV detection (all fat-soluble vitamins) and fluorescence detection (retinoids and tocopherols). Automation from sample preparation to quantification stages increases the data acquisition rate.Sociedade Brasileira de Química2004-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100020Química Nova v.27 n.1 2004reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422004000100020info:eu-repo/semantics/openAccessPaixão,José A. daStamford,Tânia L. M.por2004-03-09T00:00:00Zoai:scielo:S0100-40422004000100020Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2004-03-09T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
title |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
spellingShingle |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica Paixão,José A. da fat-soluble vitamins extraction quantification |
title_short |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
title_full |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
title_fullStr |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
title_full_unstemmed |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
title_sort |
Vitaminas lipossolúveis em alimentos: uma abordagem analítica |
author |
Paixão,José A. da |
author_facet |
Paixão,José A. da Stamford,Tânia L. M. |
author_role |
author |
author2 |
Stamford,Tânia L. M. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Paixão,José A. da Stamford,Tânia L. M. |
dc.subject.por.fl_str_mv |
fat-soluble vitamins extraction quantification |
topic |
fat-soluble vitamins extraction quantification |
description |
This study concerns certain problems inherent to the determination of fat-soluble vitamins in food, from extraction methods to identification and quantification. The discussion involves the main official and unofficial extraction methods coupled with spectrophotometric and HPLC techniques in which vitamins samples are obtained through liquid-liquid-solid and liquid-liquid-solid-solid extraction, indispensable to the analytical separation of different chemical compounds with vitamin functions. A saponification stage, possibly coupled with supercritical fluid extraction appears to be mandatory in the determination of vitamins A and E in their alcoholic forms. Alternative identification and quantification procedures are outlined: biological and chemical assays, analytical separations by HPLC (normal and reversed-phase), UV detection (all fat-soluble vitamins) and fluorescence detection (retinoids and tocopherols). Automation from sample preparation to quantification stages increases the data acquisition rate. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100020 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100020 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.1590/S0100-40422004000100020 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Química Nova v.27 n.1 2004 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318103767547904 |