Classification PDO olive oils on the basis of their sterol composition by multivariate analysis
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/732 |
Resumo: | The sterol compositions (GLC/FID/capillary column) of monovarietal olive oils (51 samples) from the most important cultivars of northeastern Portugal (Cvs. Cobranc¸osa, Madural and Verdeal Transmontana) and 27 commercial samples of olive oils with protected denomination of origin (PDO) from the same region and cultivars were evaluated. Δ-sitosterol, Δ5-avenasterol and campesterol were the most representative sterols. Cholesterol, stigmasterol, clerosterol and Δ7-stigmastenol were also found in all samples. All studied samples respected EC Regulation N. 2568, and in all cases total sterols were remarkably higher than the minimum limit set by legislation, ranging from 2003 to 2682 mg/kg. Results were analysed with the help of several statistical techniques, including reduction of dimensionality by principal component analysis with cross-validation of the number of components, followed by the use of canonical variate predictive biplots for model development and canonical variate interpolative biplots for approximate classification of monovarietal and PDO olive oils. These biplots proved to be a very interesting solution in the present case study, overcoming the problems of interpretation and classification that arise whenever different multivariate analyses are coupled together. |
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Classification PDO olive oils on the basis of their sterol composition by multivariate analysisSterolsOlive oilMultivariate analysisBiplotsThe sterol compositions (GLC/FID/capillary column) of monovarietal olive oils (51 samples) from the most important cultivars of northeastern Portugal (Cvs. Cobranc¸osa, Madural and Verdeal Transmontana) and 27 commercial samples of olive oils with protected denomination of origin (PDO) from the same region and cultivars were evaluated. Δ-sitosterol, Δ5-avenasterol and campesterol were the most representative sterols. Cholesterol, stigmasterol, clerosterol and Δ7-stigmastenol were also found in all samples. All studied samples respected EC Regulation N. 2568, and in all cases total sterols were remarkably higher than the minimum limit set by legislation, ranging from 2003 to 2682 mg/kg. Results were analysed with the help of several statistical techniques, including reduction of dimensionality by principal component analysis with cross-validation of the number of components, followed by the use of canonical variate predictive biplots for model development and canonical variate interpolative biplots for approximate classification of monovarietal and PDO olive oils. These biplots proved to be a very interesting solution in the present case study, overcoming the problems of interpretation and classification that arise whenever different multivariate analyses are coupled together.ElsevierBiblioteca Digital do IPBAlves, M. RuiCunha, Sara C.Amaral, J.S.Pereira, J.A.Oliveira, Beatriz2008-09-03T11:28:23Z20052005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/732engAlves, M.R.; Amaral, J.S.; Cunha, S.C.; Pereira, J.A.; Oliveira, M.B.P.P. (2005). Classification PDO olive oils on the basis of their sterol composition by multivariate analysis. Analytica Chimica Acta. ISSN 0003-2670. 549:1-2, p. 166-178.0003-267010.1016/j.aca.2005.06.033info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:03:45Zoai:bibliotecadigital.ipb.pt:10198/732Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:24.103227Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
title |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
spellingShingle |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis Alves, M. Rui Sterols Olive oil Multivariate analysis Biplots |
title_short |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
title_full |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
title_fullStr |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
title_full_unstemmed |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
title_sort |
Classification PDO olive oils on the basis of their sterol composition by multivariate analysis |
author |
Alves, M. Rui |
author_facet |
Alves, M. Rui Cunha, Sara C. Amaral, J.S. Pereira, J.A. Oliveira, Beatriz |
author_role |
author |
author2 |
Cunha, Sara C. Amaral, J.S. Pereira, J.A. Oliveira, Beatriz |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Alves, M. Rui Cunha, Sara C. Amaral, J.S. Pereira, J.A. Oliveira, Beatriz |
dc.subject.por.fl_str_mv |
Sterols Olive oil Multivariate analysis Biplots |
topic |
Sterols Olive oil Multivariate analysis Biplots |
description |
The sterol compositions (GLC/FID/capillary column) of monovarietal olive oils (51 samples) from the most important cultivars of northeastern Portugal (Cvs. Cobranc¸osa, Madural and Verdeal Transmontana) and 27 commercial samples of olive oils with protected denomination of origin (PDO) from the same region and cultivars were evaluated. Δ-sitosterol, Δ5-avenasterol and campesterol were the most representative sterols. Cholesterol, stigmasterol, clerosterol and Δ7-stigmastenol were also found in all samples. All studied samples respected EC Regulation N. 2568, and in all cases total sterols were remarkably higher than the minimum limit set by legislation, ranging from 2003 to 2682 mg/kg. Results were analysed with the help of several statistical techniques, including reduction of dimensionality by principal component analysis with cross-validation of the number of components, followed by the use of canonical variate predictive biplots for model development and canonical variate interpolative biplots for approximate classification of monovarietal and PDO olive oils. These biplots proved to be a very interesting solution in the present case study, overcoming the problems of interpretation and classification that arise whenever different multivariate analyses are coupled together. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005 2005-01-01T00:00:00Z 2008-09-03T11:28:23Z |
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://hdl.handle.net/10198/732 |
url |
http://hdl.handle.net/10198/732 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Alves, M.R.; Amaral, J.S.; Cunha, S.C.; Pereira, J.A.; Oliveira, M.B.P.P. (2005). Classification PDO olive oils on the basis of their sterol composition by multivariate analysis. Analytica Chimica Acta. ISSN 0003-2670. 549:1-2, p. 166-178. 0003-2670 10.1016/j.aca.2005.06.033 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799135142616236032 |