Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR)
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.5/8609 |
Resumo: | Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR)FTIRcondensed tanninsred winevalidationreverse phase fractionationMestrado Vinifera EuroMaster - Instituto Superior de AgronomiaGrape-derived condensed tannins, also known as proanthocyanidins, are critical quality components for red wines. They have been subject of numerous studies in order to find a fast and reliable methodology for their quantification. In this work it has been tested the method using Fourier transform mid-infrared (FTIR) and chemometrics to quantify the amount of condensed tannins present in 88 different red wines, with the reference method of precipitation with methylcellulose. As well it has been provided a single laboratory validation of the method of fractionation of condensed tannins by reverse phase and quantification by reaction with vanillin. The models developed for the FTIR spectroscopy were not enough robust for the estimation of total condensed tannins, with low values of coefficient of determination and low RPD values (R2 cross-validation: 0,76 and RPD cross-validation: 1,86). Validation of the fractionation method showed good performance in precision, with values of coefficient of variance for the three fractions FIII, FII and FI respectively of 5,2%; 11,4% and 11,6% and values of reproducibility of 168,1; 32,9 and 3,4 mg/L of epicatechin equivalents, but it was not possible to perform effective recovery studiesISA/ULLaureano, OlgaRepositório da Universidade de LisboaCorazzola, Alessandro2015-12-31T01:30:11Z20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/8609engCorazzola, A. - Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR). Lisboa: ISA, 2012, 69 p.info: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:RCAAP2023-12-24T01:32:23Zoai:www.repository.utl.pt:10400.5/8609Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:55:34.477356Repositório 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 |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
title |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
spellingShingle |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) Corazzola, Alessandro FTIR condensed tannins red wine validation reverse phase fractionation |
title_short |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
title_full |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
title_fullStr |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
title_full_unstemmed |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
title_sort |
Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR) |
author |
Corazzola, Alessandro |
author_facet |
Corazzola, Alessandro |
author_role |
author |
dc.contributor.none.fl_str_mv |
Laureano, Olga Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Corazzola, Alessandro |
dc.subject.por.fl_str_mv |
FTIR condensed tannins red wine validation reverse phase fractionation |
topic |
FTIR condensed tannins red wine validation reverse phase fractionation |
description |
Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 2012-01-01T00:00:00Z 2015-12-31T01:30:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.5/8609 |
url |
http://hdl.handle.net/10400.5/8609 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Corazzola, A. - Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR). Lisboa: ISA, 2012, 69 p. |
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 |
ISA/UL |
publisher.none.fl_str_mv |
ISA/UL |
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 |
instname_str |
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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1799131034583826432 |