Characterization of the key aroma-active compounds in Qingke baijiu by application of the sensory approach

Characterization and discrimination of the taste and aroma of Tibetan Qingke baijiu using electronic tongue, electronic nose and gas chromatography–mass spectrometry

“…Among them, Sannan exhibited the highest number of aldehydes, and Lhasa2 featured the highest content. It's noteworthy that previous research by Wang et al (2023) identified (E,E)-2,4-Decadienal as a key aroma compound in QKBJ, and interestingly, this compound was also detected in Qamdo samples.…”

“…These compounds are associated with aromas ranging from pineapple and fruity notes to sweetness, with ethyl phenylacetate imparting hints of rose and honey fragrances. Prior studies have concurred on the significance of these nine compounds as key aroma components within QKBJ ( Fan et al, 2020 ; Qian et al, 2019 ; Wang et al, 2023 ). Furthermore, a set of 29 esters were common across more than four highland barley wine samples, collectively embodying the shared characteristics of QKBJ.…”

“…Indeed, QKBJ from different regions exhibits distinct stylistic features. In Qinghai, critical flavor compounds in QKBJ were identified as phenylethyl acetate, ethyl hexanoate, 2-methyl-1-butanol, ethyl acetate, γ-nonalactone, and 2,3-dimethyl-5-ethyl pyrazine ( Wang et al, 2023 ). In Sichuan, the primary correlated aroma compounds included acetylglycine ethyl ester, ethyl hydrogen succinate, ethyl palmitate, ethyl phenylacetate, 2,3-butanediol, pentanoic acid, and hexanoic acid.…”

Characterization and correlations of dominant microorganisms and volatile compounds in fermentation process of Yangjiang douchi

“…Initially the column temperature was retained at 40 °C for 3 min, then the temperature was heated to 120 °C at a rate of 5 °C min −1 for 4 min, followed by a second increase to 200 °C at a rate of 8 °C min −1 , and it was maintained at 200 °C for 8 min. Ultra‐high purity helium (99.99%) was used as the carrier gas at 1.0 mL min −1 14 . The sample injection volume was 1 μL in non‐split mode.…”

“…Ultra-high purity helium (99.99%) was used as the carrier gas at 1.0 mL min −1 . 14 The sample injection volume was 1 μL in nonsplit mode. The mass spectrometry conditions were set as follows: electron ionization source, ionization energy 70 eV, ion source temperature 250 °C, mass range 45-550 m/z, full scan, solvent delay 4 min.…”