Analysis on aroma composition in Chardonnay and Riesling dry white wines from Eastern Region of Ningxia Helan Mountain
The main aroma compositions in Chardonnary,Riesling dry white wine from Eastern Region of Ningxia Henlan Mountain were studied.Solid phase micro extraction technology was used to extract aroma component from it.Internal standard method was used for quantitative analysis of detection peak.The isolated aroma compound was analyzed using gas chromatography-mass spectrometry combined with computer search technology.49 kinds of aroma substances were detected.The results showed that the dominant aroma ingredients in dry white wine were esters,alcohols,acids,phenols,terpenes,wherein the kinds of esters,alcohols,acids were 18,16,and 4,respectively.The aroma components of two varieties of wine sample (Chardonnay and Riesling) were significantly different,and the content of the relevant aroma composition was not proportional to the size of their contribution,but had a closer relationship with Odor Activity Value (OAV).The main flavor components of Riesling wine were comparable to those of Chardonnay.Chardonnay possessed smell of green apple and strawberry fruit.Riesling possessed obvious floral and fruity taste,and exhibit bananas,coconut and other tropical fruit and cheese dairy flavors after aging of elegant flavored liqueur.Results from detection by Gas Chromatograph-Mass Spectrometer(GC-MS)showed that in the 49 kinds of aroma components,the contribution of esters was significantly higher than that of alcohols and acids among dominant compounds.,Terpene and phenolic had high contribution in trace elements.Although the content of some material was low,they made high contribution to aroma.Cluster analysis showed that the effect of age on aroma of new wine was higher than that of species,but the species differences were predominated for old wine samples.
dry white winegas chromatography-mass spectrometry(GC-MS)aroma composition
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