Integration of Chemometrics and Sensory Metabolomics to Validate Quality Factors of Aged Baijiu (Nianfen Baijiu) with Emphasis on Long-Chain Fatty Acid Ethyl Esters
Open Access
Abstract
The storage process of Baijiu is an integral part of its production (the quality undergoes substantial changes during the aging process of Baijiu). As the storage time extends, the flavor compounds in Baijiu tend to undergo coordinated transformation, thereby enhancing the quality of Baijiu. Among them, long-chain fatty acid ethyl esters (LCFAEEs) were widely distributed in Baijiu and have been shown to have potential contributions to the quality of Baijiu. However, the current research on LCFAEEs in Baijiu predominantly focuses on the olfactory sensation aspect, while there is a lack of systematic investigation into their influence on taste and evaluation after drinking Baijiu during the aging process. In light of this, the present study investigates the distribution of LCFAEEs in Baijiu over different years. We have combined modern flavor sensory analysis with multivariate chemometrics to comprehensively and objectively explore the influence of LCFAEEs on Baijiu quality. The results demonstrate a significant positive correlation between the concentration of LCFAEEs and the fruity aroma (p < 0.05, r = 0.755) as well as the aged aroma (p < 0.05, r = 0.833) of Baijiu within a specific range; they can effectively reduce the off-flavors and spicy sensation of Baijiu. Furthermore, additional experiments utilizing a single variable suggest that LCFAEEs were crucial factors influencing the flavor of Baijiu, with Ethyl Palmitate (EP) being the most notable LCFAEE that merits further systematic investigation.Keywords
Funding Information
- National Natural Science Foundation of China (32001826, 2022YFD2101205, BYESS2023055, 20230417)
- National Key R&D Program of China (32001826, 2022YFD2101205, BYESS2023055, 20230417)
- Beijing association for science and technology young elite scientist sponsorship program (32001826, 2022YFD2101205, BYESS2023055, 20230417)
- 2023 Beijing Technology and Business University Graduate Student Discipline Competition Project (32001826, 2022YFD2101205, BYESS2023055, 20230417)
This publication has 59 references indexed in Scilit:
- Effects of aging on the quality of roasted sesame-like flavor DaquBMC Microbiology, 2020
- Characterization of key aroma compounds in Laobaigan Chinese Baijiu by GC×GC‐TOF/MS and means of molecular sensory scienceFlavour and Fragrance Journal, 2019
- Amelioration of 4-methylguaiacol on LPS-induced inflammation in THP-1 cells through NF-κB/IκBα/AP-1 and Nrf2/HO-1 signaling pathwayJournal of Functional Foods, 2019
- Anti-inflammatory Mechanism Involved in 4-Ethylguaiacol-Mediated Inhibition of LPS-Induced Inflammation in THP-1 CellsJournal of Agricultural and Food Chemistry, 2019
- Quantification and cytoprotection by vanillin, 4-methylguaiacol and 4-ethylguaiacol against AAPH-induced abnormal oxidative stress in HepG2 cellsRSC Advances, 2018
- Effect of Fermentation Processing on the Flavor of BaijiuJournal of Agricultural and Food Chemistry, 2018
- Characterization of key aroma compounds in Gujinggong Chinese Baijiu by gas chromatography–olfactometry, quantitative measurements, and sensory evaluationFood Research International, 2018
- Intracellular antioxidant effect of vanillin, 4-methylguaiacol and 4-ethylguaiacol: three components in Chinese BaijiuRSC Advances, 2017
- Characterization of the Key Odorants in Chinese Zhima Aroma-Type Baijiu by Gas Chromatography–Olfactometry, Quantitative Measurements, Aroma Recombination, and Omission StudiesJournal of Agricultural and Food Chemistry, 2016
- Colorimetric artificial nose for baijiu identificationFlavour and Fragrance Journal, 2012