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CHROMATOGRAPHIC STUDY OF THE INFLUENCE OF LINOLEIC ACID AND ISO‐α‐ACIDS IN THE FORMATION OF CARBONYLS IN BEER
Author(s) -
SalaFortuny H.,
DiazMarot A.,
Matas M. Gassiot,
FerrerMartin M.
Publication year - 1985
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1985.tb04301.x
Subject(s) - chemistry , autoxidation , linoleic acid , chromatography , high performance liquid chromatography , gas chromatography , organic chemistry , fatty acid
The influence of the concentration of linoleic acid, iso‐α‐acids and metabisulphite in the formation of volatile carbonyls in beer has been studied. The ageing of the beer is effected by means of a 1.5 hour reflux at pH=2 and the carbonyl compounds are determined by high pressure (HPLC) liquid chromatography of the corresponding 2.4 dinitrophenylhydrazones (DNPS). It has been shown that carbonyls with more than 5 carbon atoms mainly come from the autoxidation of linoleic acid. The inhibiting action of metabisulphite has also been confirmed