Premium
DETERMINATION OF INDIVIDUAL ALPHA ACIDS AND BETA ACIDS OF HOPS BY GAS CHROMATOGRAPHY
Author(s) -
Hautke Přemysl
Publication year - 1966
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.2050-0416.1966.tb02999.x
Subject(s) - chemistry , gas chromatography , volatile fatty acids , chromatography , isobutyric acid , ion chromatography , organic chemistry , isopropyl , distillation , rumen , fermentation
A new method is described for determining α acids and β acids of hops by gas chromatography. The method consists of splitting off the side chains of the lower fatty acids (isobutyric, 2‐methylbutyric and isovaleric acids) by oxidation with hydrogen peroxide in an alkaline medium. The corresponding fatty acids are disengaging from their salts by passage through an ion exchanger and they are then esterified in isopropyl alcohol. The esters are shaken out into ether and, after distillation, determined by gas chromatography.