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咖啡为什么会变酸
更新时间: 2020-09-25 00:00:00  

咖啡放凉之后会变酸,是因为咖啡豆子本身就是一种水果,所以富含单宁酸,当咖啡温度下降之后,单宁酸释放出来,而且在温度较低的时候,人类的味觉对酸味更加的明显。加之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,进而变酸。

关键词: 咖啡 为什么

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