Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.13/910
Título: Multivariate analysis for the classification and differentiation of Madeira wines according to main grape varieties
Autor: Câmara, J. S.
Alves, M. A.
Marques, J. C.
Palavras-chave: Wine
Volatile compounds
HS-SPME/GC-MS analysis
PCA
SLDA
.
Faculdade de Ciências Exatas e da Engenharia
Data: Fev-2006
Editora: Elsevier
Citação: Câmara, J. S., Alves, M. A., & Marques, J. C. (2006). Multivariate analysis for the classification and differentiation of Madeira wines according to main grape varieties. Talanta, 68(5), 1512-1521.
Resumo: In order to differentiate and characterize Madeira wines according to main grape varieties, the volatile composition (higher alcohols, fatty acids, ethyl esters and carbonyl compounds) was determined for 36 monovarietal Madeira wine samples elaborated from Boal, Malvazia, Sercial and Verdelho white grape varieties. The study was carried out by headspace solid-phase microextraction technique (HS-SPME), in dynamic mode, coupled with gas chromatography–mass spectrometry (GC–MS). Corrected peak area data for 42 analytes from the above mentioned chemical groups was used for statistical purposes. Principal component analysis (PCA) was applied in order to determine the main sources of variability present in the data sets and to establish the relation between samples (objects) and volatile compounds (variables). The data obtained by GC–MS shows that the most important contributions to the differentiation of Boal wines are benzyl alcohol and (E)-hex-3-en-1-ol. Ethyl octadecanoate, (Z)-hex-3-en-1-ol and benzoic acid are the major contributions in Malvazia wines and 2-methylpropan-1-ol is associated to Sercial wines. Verdelho wines are most correlated with 5-(ethoxymethyl)-furfural, nonanone and cis-9-ethyldecenoate. A 96.4% of prediction ability was obtained by the application of stepwise linear discriminant analysis (SLDA) using the 19 variables that maximise the variance of the initial data set.
Peer review: yes
URI: http://hdl.handle.net/10400.13/910
DOI: 10.1016/j.talanta.2005.08.012
Aparece nas colecções:Artigos em revistas internacionais

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