Study of SO 2 Dosage Effects on Volatile Compounds in Low Alcohol Tomato Wines

The major volatile compounds in low alcohol tomato wines with different dosage of SO2 treatment before fermentation were analyzed by gas chromatography-mass spectrometry. In 0×10-6, 10×10-6, 20×10-6 SO2 treatments respectively on 49, 55, 54 kinds of volatile components were detected: they are esters, volatile acids and alcohols, which represented 94.87%, 96.18%, 97.41% of the total peak area respectively. The characteristic aroma components in low alcohol tomato wines include: 3-methyl-1-butanol,o ctanoic,h exanoic,1 -butanol-3-methyla cetate,e thyl acetate, phenylethanol, ethylh exanoate, ethylo ctanote, 2-methyl-1-propanol, 1-hexanol, phenylethyl acetate, and ethyl butanoate, etc. Sensory evaluation showsd that 10×10-6 SO2 treatment is the best on aroma and taste.