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STUDIES ON BEER HAZE FORMATION. 1. GAS CHROMATOGRAPHIC PROFILES OF BEER: POLYAMIDE RESIN ADSORBATES *
Author(s) -
Gracey D. E. F.,
Barker R. L.
Publication year - 1976
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.2050-0416.1976.tb03729.x
Subject(s) - chemistry , phenols , chromatography , polyamide , fraction (chemistry) , gas chromatography , organic chemistry , catechin , methanol , mass spectrometry , glycoside , polyphenol , antioxidant
A methanol‐soluble fraction of beer‐Nylon 66 adsorbates has been examined by gas chromatography using enhanced volatilities afforded by trimethylsilylation. Mass spectrometry was used to assign structures to several profile components which included fatty acids, residual wort carbohydrates and phenols. The latter comprised free acids, the most prominent being p‐hydroxy‐cinnamic and ferulic acids, catechins, a catechin glycoside, dicatechin and condensed biflavans. Flavonoids were not observed. The profiles can be used to gain information, which has hitherto been unavailable from paper and thin layer chromatographic studies, on the relative concentrations of adsorbate components. PVP‐adsorbate profiles contained the same phenols as were observed in the Nylon profiles.