Abstract
Classification of Feng-flavor Baijiu considering aging category was furnished with a comprehensive fingerprinting strategy which used UPLC-Orbitrap and foodomics, and the most discriminant 29 compounds related to aging, 15 organic acids, 8 esters as well as some carbonyl compounds were discovered. Increase of aromatic organic acids, decline of carcinogenic dibutyl phthalate and generation of numerous aromatic substances in Baijiu were caused by irradiation until the system reached a relatively stable state which needed 28 days. It is similarity of physical and chemical reaction process of natural aging and irradiation maturation that both can facilitate flavor of base Baijiu, while the aging time can be plainly shorten utilizing irradiation for Baijiu, whose outcome has been demonstrated by LC-MS and sensory evaluation. The combination of UPLC-Orbitrap and foodomics was applied as a valid tactic to analyze a complex system and gamma irradiation can be a powerful tool to promote Baijiu aging.
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