啤酒中的硫化物

Sulfides in Beer

啤酒中存在的含硫化合物主要有硫化氢、二甲基硫、低分子硫醇等，它们使啤酒产生嫩啤酒味、蔬菜味，影响啤酒的感官质量。酵母代谢过程中分解含硫氨基酸，是啤酒中含硫化合物的主要来源。酵母菌种，工艺条件，麦汁质量以及来自原料或设备的铜离子、锌离子是影响啤酒中硫化物含量的主要因素。

The major sulfides present in beer are sulfurated hydrogen,dimethyl sulfide,and some low molecule mercaptans.The green beer odor and vegetable odor arised from sulfides affect the sensory quality of beer.The decomposition of sulfur-containing amino acids during the metabolism of yeast is the main cause of sulfides formation.Yeast strain,processing conditions,wort quality and Cu ++ ,Zn ++ from raw material or equipment are the principal factors which influence the amount of sulfides in beer.