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Identification of aroma compounds in Chinese ‘Yanghe Daqu’ liquor by normal phase chromatography fractionation followed by gas chromatography[sol ]olfactometry
Author(s) -
Fan Wenlai,
Qian Michael C.
Publication year - 2006
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/ffj.1621
Subject(s) - ethyl hexanoate , chemistry , aroma , chromatography , hexanoic acid , olfactometry , fractionation , gas chromatography , fraction (chemistry) , organic chemistry , food science
Aroma compounds in Chinese ‘Yanghe Daqu’ liquor were investigated with normal phase chromatography fractionation followed by gas chromatography–olfactometry (GC–O). Yanghe Daqu liquor was extracted with Freon 11, and then separated into acidic and neutral[sol ]basic fractions. The neutral[sol ]basic fraction was further separated into four fractions, using silica gel normal phase chromatography. Aroma compounds in each fraction were analysed by GC–O and GC–MS. The results showed that Yanghe Daqu liquor aroma was mainly contributed by esters and fatty acids. Among them, ethyl hexanoate (Osme value =15), ethyl butanoate (Osme value ≥14) were probably the most important esters, based on their Osme values. In addition, ethyl octanoate, 3‐methylbutyl hexanoate and ethyl pentanoate could be important (Osme values ≥10). Acids with high Osme value included hexanoic, butanoic, 3‐methylbutanoic and pentanoic acids. They contributed to sour, acid, cheesy and sweaty aromas. 1‐Hexanol and 3‐methylbutanol also had high Osme values. In addition, 4‐ethylguaiacol, 4‐methylguaiacol and 4‐ethylphenol were identified in Yanghe Daqu liquor and they contributed to clove, sweet, smoky and goaty aromas. 1,1‐Diethoxy ethane, 1,1‐diethoxy‐2‐methylpropane and 1,1‐diethoxy‐3‐methylbutane were identified and they gave fruity and floral aromas. Copyright © 2005 John Wiley & Sons, Ltd.