Typical aroma characteristics of Guangxi native wines Lingfeng and Yeniang No. 2

【Objective】To provide theoretical support for the exploration of aroma characteristics and quality improvement of Guangxi native wine，this study identified the specific aroma components and typical aroma characteristics of Guangxi native wines Lingfeng and Yeniang No. 2.【Method】Headspace solid-phase microextraction/gas chromatographymass spectrometry（HS-SPME-GC-MS）technique was used to identify the types and contents of volatile components in native wines brewed by two Vitis quinquangularis cultivars Lingfeng and Yeniang No. 2. Aroma activity value（OAV） was used to identify the active aroma components and the characteristic aroma components with outstanding contribution. The aroma profiles method and aroma analysis method were used to determine the distinctive aroma characteristics of the two wine varieties.【Result】The color of Lingfeng wine was more vivid. However，its indicators such as dry extract，titratable acid，and total sugar comtents were lower than those of Yeniang No. 2. Both of them were dry wines. A total of 77 volatile components were identified in the two wine samples，including 15 alcohols，48 esters，2 aldehydes，3 terpenes， 4 acids and 5 others. With 49 components identified in Lingfeng and a total volatile content of 17464.7 μg/kg，while Yeniang No. 2 had 58 components identified with a total volatile content of 12584.6 μg/kg. Through OAV analysis，9 active aroma components were determined for Lingfeng wine，with characteristic aroma compounds such as ethyl caprate，ethyl caproate，ethyl acetate，and ethyl caprylate. For Yeniang No. 2 wine，13 active aroma components were identified，with characteristic aroma compounds including ethyl isovalerate，isoamyl acetate，ethyl butyrate，ethyl caprylate and methyl caprate. Through aroma profiles and aroma analysis，the typical aroma characteristics of Lingfeng wine included fruity aroma，fatty aroma，floral aroma，and a small amount of roasty aroma and sweety aroma，while Yeniang No. 2 wine exhibited typical aroma characteristics of fruity aroma，fatty aroma，floral aroma，sweety aroma.【Conclusion】The two native wines of Guangxi exhibit characteristics of East Asian group，with fruity aroma as the main feature，but there may be some unpleasant flavors such as fatty aroma，and the floral aroma characteristics are relatively weak. Lingfeng wine has better overall aroma quality in aroma intensity and typicality.