天气预报 > 其他 > 紫薯熬汤变绿色怎么办
紫薯熬汤变绿色怎么办
更新时间: 2020-11-04 00:00:00  

紫薯煮水或紫薯煮粥,汤色呈蓝绿色是很正常的现象。因为紫薯里面含有花青素,这是一种水溶性色素,而花青素遇到酸碱就会改变颜色,遇到酸性则会呈红色,遇到碱性则会呈偏蓝绿色。由于我们平常家里常饮用的自来水一般都呈碱性,所以煮紫薯的水颜色就多呈蓝绿色的。

防止紫薯煮的水变蓝绿色:不用自来水煮就行了,比如用中性的开水煮。或者加一点点白醋或者柠檬汁之类的酸性液体就能变回紫色。

关键词: 绿色 怎么办

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