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Wines from Antão Vaz, Arinto, Fernão Pires, Verdelho da Madeira and Viosinho grape cultivars, from 2009 and 2010 vintages, were studied in order to characterize the volatile thiols profile, namely 4-mercapto-4-methyl-pentan-2-one (4MMP), 3-mercaptohexan-1-ol (3MH) and 3-mercaptohexyl acetate (3MHA). Volatile thiols profile of these wines was also compared to a Sauvignon blanc wine produced in Portugal. Besides sensory analysis, all wines were analyzed using GC coupled to different detectors, namely FID, FPD, MS and Olfactometry (GC-O). In all wines, GC-O analyses showed the existence of two olfactory zones related to the presence of 4MMP and 3MH. A third olfactory zone for 3MHA was only observed for the youngest wines. The wines produced from Portuguese cultivars presented aromatic intensities comparable or even higher than those obtained in the Sauvignon blanc wine. Indeed, 3MH was found in all wines and the highest amounts were observed in Antão Vaz, Arinto and Viosinho wines. In general, these findings are in agreement with those obtained by sensory analysis.
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Citação
FERREIRA, D... [et al.] - Varietal thiols in white wines from portuguese grape varieties. In World Congress of Vine and Wine, 34th, Porto, Portugal, 20-28 Junho 2011 - Proceedings of the 34th World Congress of Vine and Wine. Porto: Um Porto para o Mundo- Associação para o Congresso OIV, 2011. ISBN 978-989-20-2449-3. 8p.
Editora
Um Porto Para O Mundo – Associação para o Congresso OIV 2011