Chemical signatures and sensory perception of <i>Nongxiangxing Baijiu</i>: regional and quality-grade discrimination and the modulatory role of ethanol.

Statistical significance was set at p < 0.05, with the following significance levels: significant ( p < 0.05, *); highly significant ( p < 0.01, **); and extremely significant ( p < 0.001, ***). 3 Results and discussion 3.1 Differences in sensory profiles between Nongxiangxing base Baijiu from the Yibin and non-Yibin production regions To examine whether Nongxiangxing base Baijiu differs at the sensory level between the Yibin and Non-Yibin regions, all 14 samples were diluted to 52% vol and profiled using Rate-All-That-Apply (RATA).

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