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咖啡为什么变酸
更新时间: 2020-06-29 00:00:00  

咖啡中含有丹宁酸,煮沸后的丹宁酸会分解成焦梧酸,咖啡中的焦梧酸很容易在冷却的过程中起变化,使口味变酸, 咖啡中含有蔗糖等营养物质,而空气中又到处充满细菌,并不时地进入到咖啡中,时间长了,细菌繁殖,分解蔗糖为葡萄糖,并产生副产物,而细菌繁殖过程中产生的副产物,虽不是所有的都有毒有害,但相当一部分是有毒的。

关键词: 咖啡 为什么

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