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如何辨别牛奶是否变质
更新时间: 2020-07-01 00:00:00  

1、把牛奶滴在指甲上,奶液流散的是变质牛奶,奶滴呈球状停在指甲上的是新鲜牛奶;

2、在盛水的碗里滴几滴鲜奶,如果奶汁凝固沉底,说明质量较好而且奶质新鲜,假若浮散于水面,则说明质量不佳或者已经变质;

3、外观颜色呈乳白色的是新鲜奶,而色泽淡黄、奶上有水状析出物的表明是陈奶;

4、将牛奶煮沸,稍稍冷却,表面有一层奶皮乳脂的是鲜奶,表面出现豆腐花状的是陈奶、变质奶,假若味道发苦,发酸或有其他异味,说明牛奶已经变质。

关键词: 如何 辨别 牛奶 是否 变质

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