Enzymatic determination of L(-)malic and L(+)lactic acids in wine by flow injection analysis
Autor(a) principal: | |
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Data de Publicação: | 1992 |
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/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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799131729509744640 |