Sulphur compounds in fermented liquors: a review

Abstract

This review discusses the sources of the sulphur compounds found in beverages. It summarises the nomenclature of these compounds and gives typical values for their threshold values in beers and wines. Practical observations on the reasons for the formation of these compounds are discussed and the methods most suitable for their removal are listed. A more technical section reviews the biochemical processes by which many of the compounds are formed, with particular reference to the importance of the amino acids metkionine and cysteine, and the role of nitrogen nutrients, including amino acids. Recent work on the importance of yeast strains is discussed, and suggestions made for further research into this and other aspects of the causes of the formation of volatile sulphur compounds in wines.