Spirit grape marc

These compounds were not found in the wines studied. Nonetheless, some were detected in a grape marc spirit with a clear reducing defect in which we detected the presence of cw-/fran -3,5-dimethyl-1,2,4-trithiolane and cw-/fran.y-3,6-dimethyl-1,2,4,5-tetrathiane, although neither di-/fran.y-4,7-dimethyl-1,2,3,5,6-pentatiepane nor 1,1-ethanedithiol were detected. These compounds could possibly come from the base wine used for the distillation, although it is prohibited to use SO2 in wines used for this purpose. The hypothesis according to which ethanal is free to react with H2S is, therefore, reinforced. 

A list of carbonyl compounds identified in Chardonnay and Cabernet Sauvignon wines (before and after MLF) and grappa samples (spirit produced by distillation of fermented grape marc), are reported in Table 5.8 (Flamini et al., 2002a 2005a). 

Grape marc spirit (produced by distillation of fermented grape marc) 1000 3.3... 

Fotakis, C.H., Christodouleas, D., Kokkotou, K., Zervou, M., Zoumpoulakis, P., Moidos, P., Li-ouni, M., and Calokerinos, A. 2013a. NMR metabolite profiling of greek grape marc spirits ... 

Marc brandy is derived from the skins of grapes after the juice has been extracted it is nsed for flavouring other spirits. 

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