TRACE VOLATILE CONSTITUENTS OF BEER PART I

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Abstract
Fusel oil components found in beer include methanol, n-propanol, isopropanol, n-butanol, sec-butanol, isobutanol, 2-methyl butanol, 3-methyl butanol, ethyl acetate, sec-butyl acetate, isobutyl acetate and isoamyl acetate. A refined isolation procedure has allowed the recognition of a number of hop oil constituents in beer apart from those previously reported. In addition, several of the volatile substances which occur in beer have been shown to originate from malt and to occur in the essential oil of barley and malt husk. Hop oil, malt husk oil and identified fusel oil components together account for all but seven of fifty neutral steam-volatile ether-soluble constituents of beer so far detected.