| Aroma as the sensory indicator of sweet wine has important influence on the quality of sweet wine and also become improtant factor for consumers to chose. Volatile composition analysis of sweet wine can real reflect the aroma of sweet wine, and will contribute to reveal the formation mechanism of the characteristics aroma of sweet wine.Taking the sweet wine of vida as the research object, through sensory evaluation and GC-MS instrumental analysis, studies the chemical basis which form aroma characteristics of vidal sweet wine, and combined with the OAV of volatile substances to find out the correlation of these quantitative data and sweet wine aroma. And combination with sensory evaluation, determine the key vidal sweet wine aroma components and characteristics of aroma.The main results were as the follows:1.Preliminarily identified the 135 kinds of volatile flavor substances,41 kinds of ester substances, 17 kinds of alcohols,17 kinds of alkanes,10 kinds of carboxylic acid,12 kinds of aldehyde,9 kinds of ketone,9 kinds of terpene, other class 20 kinds of matter. The activity aroma compounds of four vidal sweet wine which is in different years, different regions have 18 species,is the main aroma substances of vidal sweet wine.2.There are 11 kinds of material in four of wine have odor activity value. The odor activity value of 4-methyl-4-mercapto-2-pentanone is highest, make sweet wines show the bitter and grapefruit flavors;Octanoic acid ethyl ester, isoamyl acetate, ethyl caproate and ethyl acetate mainly provide fruity for sweet wine;eugenol,2-phenyl ethanol make wine with flowers.3.The whole of the vidal sweet wine aroma characteristics show the honey, sweet apple, grapefruit flavour. Sweet white wine from Lan Yuegu is outstanding in bitter almond, fat flavour; icewine of Zhang Yu has flower and outstanding roses and caramel unique taste; ice wine of Ba Gesi fruity aroma is prominent, with obvious plants flavour; sweet wine of Canada has the aroma of pineapple and malt. |
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