天气预报 > 其他 > 紫薯用铁锅煮为何会变绿
紫薯用铁锅煮为何会变绿
更新时间: 2020-07-06 00:00:00  

紫薯中含有大量的花青素,铁锅变绿就是由它们引起的。花青素是一种水溶性的天然色素,它的特点是在酸性下呈红色,碱性下通常会变蓝,中间还可能有紫色、绿色等过渡色。若颜色比较深,可能呈现紫黑状态。我国大部分北方地区水呈弱碱性,因此在煮紫薯时,会出现水和紫薯皮都变绿的现象。与此类似,用碱水洗草莓发蓝、紫米粉加小苏打变绿也是花青素的作用,这都为正常现象,变色的食物也还可以食用。

关键词: 铁锅 为何

紫薯用铁锅煮为何会变绿相关经验

天气预报

最新推荐

页面:/news/view-3232486/ | 耗时:0.7566 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=3232486 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3232486 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3232486 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(153164,156013,1084445,1127631,741831,1065125,1117920,219117,708965,408381,1090525,1124209,1541858,113913,1102054,3277214,1662971,1083469,1118869,2502865,1062530,351627,1066066,206695,1043987,1278123,195891,300600,1323245,375497) ORDER BY field (ArticleID,153164,156013,1084445,1127631,741831,1065125,1117920,219117,708965,408381,1090525,1124209,1541858,113913,1102054,3277214,1662971,1083469,1118869,2502865,1062530,351627,1066066,206695,1043987,1278123,195891,300600,1323245,375497)