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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Use of chemometrics to characterize tropical wines from different vintages and grape cultivars according to the 1H NMR spectroscopy data.
Autores:  GOMES NETO, H.
HALLWASS, F.
SILVA, J. B. P. da
PEREIRA, G. E.
Data:  2011-10-20
Ano:  2011
Palavras-chave:  Vinho
Quimiometria
Uva
Resumo:  Tropical wines have been produced in Northeast of Brazil since 1980's, between the 8° and 9° S latitude, in a region called Sub-rniddle São Francisco river Valley. This area presents an intra-annual climate variability and wines can be elaborated in different months of the year, according to the winery, with different analytical characteristics due to the climatic conditions. NMR spectroscopy is an interesting tool that allows to determine in a single analysis many analytical compounds of the wines. PCA and PLS rnultivariate statistical analyses applied on NMR data allow to discriminate samples and to identify the responsible compounds for the clustering. The aim of this work was to use chemometrics, PCA and PLS, applied on IH NMR spectroscopy data, to characterize tropical wines from different vintages and grape cultivars, in Northeast of Brazil. Wines were elaborated by using traditional winemaking process with control of the fermentations temperature and use of antioxidants. Before statistical analyses, IHNMR spectra were segmented, normalized, converted to Excel software format and further processed for PCA and PLS analyses. Statistical analyses applied on NMR spectra data were not satisfactory to discriminate between different vintages of white and red wines together, but they were able to separate each one according to different vintages and cultivars. Metabolic compounds were found to explain wine clusters, and fingerprints are discussed.

2011
Tipo:  Artigo em anais de congresso (ALICE)
Idioma:  Inglês
Identificador:  45756

http://www.alice.cnptia.embrapa.br/handle/doc/903539

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/130948/1/45756.pdf
Editor:  In: INTERNATIONAL SYMPOSIUM OF THE GROUP OF INTERNATIONAL EXPERTS OF VITIVINICULTURAL SYSTEMS FOR COOPERATION, 17., 2011, Asti. Proceedings... Asti: Le Progrès Agricole et Viticole, 2011.
Relação:  Embrapa Semiárido - Artigo em anais de congresso (ALICE)
Formato:  p. 29--31
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