Abstract
The fate of dimethyl sulphide (DMS) and its precursors, S-methylmethionine (SMM) and dimethyl sulphoxide (DMSO), in the malting and brewing processes, has been studied on both a laboratory and a production scale. The information gained has been used to show how the level of DMS in beer may be controlled. The principal determinant of the beer DMS level was the SMM present in malt. DMSO was not a significant precursor of DMS in normal lager production.

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