Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis

Detalhes bibliográficos
Autor(a) principal: Lima, José L. F. C.
Data de Publicação: 1992
Outros Autores: Rangel, António O. S. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.14/6481
Resumo: The enzymatic determination of L(-)malic and L(+)lactic acids in several types of wines by flow injection analysis (FIA) with spectrophotometric detection is described. This flow injection system, which incorporates a dialysis unit for adjusting the composition of the injected solutions to the requirements of the measuring system, enables determinations of these two organic acids without the need for any prior treatment of the wine samples, with a concentration interval of between 0.02 and 4 g/L, and a sampling rate of approximately 20 determinations per hour. The results obtained with this FIA method for various types of Portuguese wines are in good agreement with those of the batch method which uses the same enzymatic technique and are quite precise as they present a coefficient of variation below 2.5%.
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spelling Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysisFlow injection analysisL(-)malic acidL(+)lactic acidSpectrophotometric enzymatic determinationWineThe enzymatic determination of L(-)malic and L(+)lactic acids in several types of wines by flow injection analysis (FIA) with spectrophotometric detection is described. This flow injection system, which incorporates a dialysis unit for adjusting the composition of the injected solutions to the requirements of the measuring system, enables determinations of these two organic acids without the need for any prior treatment of the wine samples, with a concentration interval of between 0.02 and 4 g/L, and a sampling rate of approximately 20 determinations per hour. The results obtained with this FIA method for various types of Portuguese wines are in good agreement with those of the batch method which uses the same enzymatic technique and are quite precise as they present a coefficient of variation below 2.5%.American Society for Enology and ViticultureVeritati - Repositório Institucional da Universidade Católica PortuguesaLima, José L. F. C.Rangel, António O. S. S.2011-10-19T21:10:01Z19921992-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/6481engLIMA, José L. F. C.; Rangel, António O.S.S. - Enzymatic Determination of L(-)malic and L(+)lactic Acids in Wine by Flow Injection Analysis . American Journal of Enology and Viticulture. ISSN 0002-9254. Vol. 43 n.º 1 (1992), p. 58-62info: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:RCAAP2023-07-12T17:11:17Zoai:repositorio.ucp.pt:10400.14/6481Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:06:18.280475Repositório 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 Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
title Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
spellingShingle Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
Lima, José L. F. C.
Flow injection analysis
L(-)malic acid
L(+)lactic acid
Spectrophotometric enzymatic determination
Wine
title_short Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
title_full Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
title_fullStr Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
title_full_unstemmed Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
title_sort Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
author Lima, José L. F. C.
author_facet Lima, José L. F. C.
Rangel, António O. S. S.
author_role author
author2 Rangel, António O. S. S.
author2_role author
dc.contributor.none.fl_str_mv Veritati - Repositório Institucional da Universidade Católica Portuguesa
dc.contributor.author.fl_str_mv Lima, José L. F. C.
Rangel, António O. S. S.
dc.subject.por.fl_str_mv Flow injection analysis
L(-)malic acid
L(+)lactic acid
Spectrophotometric enzymatic determination
Wine
topic Flow injection analysis
L(-)malic acid
L(+)lactic acid
Spectrophotometric enzymatic determination
Wine
description The enzymatic determination of L(-)malic and L(+)lactic acids in several types of wines by flow injection analysis (FIA) with spectrophotometric detection is described. This flow injection system, which incorporates a dialysis unit for adjusting the composition of the injected solutions to the requirements of the measuring system, enables determinations of these two organic acids without the need for any prior treatment of the wine samples, with a concentration interval of between 0.02 and 4 g/L, and a sampling rate of approximately 20 determinations per hour. The results obtained with this FIA method for various types of Portuguese wines are in good agreement with those of the batch method which uses the same enzymatic technique and are quite precise as they present a coefficient of variation below 2.5%.
publishDate 1992
dc.date.none.fl_str_mv 1992
1992-01-01T00:00:00Z
2011-10-19T21:10:01Z
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/10400.14/6481
url http://hdl.handle.net/10400.14/6481
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv LIMA, José L. F. C.; Rangel, António O.S.S. - Enzymatic Determination of L(-)malic and L(+)lactic Acids in Wine by Flow Injection Analysis . American Journal of Enology and Viticulture. ISSN 0002-9254. Vol. 43 n.º 1 (1992), p. 58-62
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 American Society for Enology and Viticulture
publisher.none.fl_str_mv American Society for Enology and Viticulture
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
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