步骤
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将鸡蛋放入水中,看它是否会浮起来。 鸡蛋里有一个小小的气室,时间一长,空气会透过鸡蛋壳上的小孔慢慢进入到鸡蛋之中。进入到鸡蛋中的空气越多,鸡蛋中的气室就越大,鸡蛋就越容易浮起来。 [1] X 研究来源
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敲开鸡蛋,将它盛在大碗或者盘子里。 时间越长,鸡蛋的完整度就越差,所以不能像新鲜鸡蛋一样黏在一起。看看鸡蛋是在盘子上大面积地散开,还是很好地聚合在一起。散开的鸡蛋或者说看起来有点稀的鸡蛋,它的蛋白较少,并且已经过了最新鲜的时候了。 [7] X 可靠来源 Food Safety and Inspection Service of the USDA 前往来源
- 如果蛋黄很扁,并且很容易破,那么这个鸡蛋已经不新鲜了。 [8] X 可靠来源 Food Safety and Inspection Service of the USDA 前往来源
- 如果蛋黄的活动性很强,说明卵黄系带(浓稠的蛋白带状物,可维持蛋黄在蛋白中央)已经老化了,鸡蛋也在慢慢变质。 [9] X 可靠来源 Food Safety and Inspection Service of the USDA 前往来源
- 观察蛋白的颜色。如果蛋白比较浑浊,说明这个鸡蛋很新鲜。如果蛋白很清,说明鸡蛋已经老化了,但或许还是可以食用。 [10] X 可靠来源 Food Safety and Inspection Service of the USDA 前往来源
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利用生产编码了解包装时间。 虽然中国并没有规定用生产编码来表示日期,但这在有的国家还是很常见。拿美国来举例。所有的鸡蛋都必须标明包装时间,这个包装时间通常是三位数的编码,而这个编码则来自儒略历。举个例子,一月一号包装的鸡蛋,其生产编码则为001。如果包装日期是八月十五号,那么生产编码则是288。如果是十二月三十一号的话,生产编码就是365。 [21] X 研究来源
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从冰箱里拿出来的鸡蛋,如果在常温下待了两个小时及以上,你需要把它们扔掉。 一旦鸡蛋被放进冰箱冷藏起来,你必须要在同一温度下保存它。被冷藏过的鸡蛋如果放到温暖的环境里,它会凝结空气中的水分,促使细菌在鸡蛋外部繁衍。因为蛋壳上有无数的小孔,所以蛋壳上的细菌有可能会进到鸡蛋里,并感染鸡蛋。
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根据包装上的说明决定鸡蛋的储存时间。 如果你家里有一只会下蛋的母鸡,但你不知道鸡蛋什么时候会过期的话,你可以查查我们国家的食品管理准则。一般来说,鸡蛋在两个月之内都是没有问题的。
- 如果你不知道鸡蛋已经放了多久了,或者说你觉得你的鸡蛋已经超过两个月了,请学习如何识别坏鸡蛋,然后再决定是否使用它们。
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警告
- 如果鸡蛋是拿给老人或者小孩等高危人群食用的,最好是使用最新鲜的鸡蛋。虽然超过保质期几周的鸡蛋通常不会有什么问题,但是对于免疫力较弱的群体,你还是应当格外注意,最好只给他们吃最新鲜的鸡蛋。
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参考
- ↑ http://www.ochef.com/789.htm
- ↑ http://simmerandboil.cookinglight.com/2013/08/28/can-i-use-expired-eggs/#sthash.k0mefnAr.dpuf
- ↑ http://simmerandboil.cookinglight.com/2013/08/28/can-i-use-expired-eggs/#sthash.k0mefnAr.dpuf
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index#32
- ↑ http://www.ochef.com/789.htm
- ↑ http://cooking.stackexchange.com/questions/47036/egg-safety-when-to-eat-and-when-to-not-eat
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index#32
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index#32
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index#32
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://cooking.stackexchange.com/questions/47036/egg-safety-when-to-eat-and-when-to-not-eat
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index#32
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.efsa.europa.eu/en/press/news/140731
- ↑ http://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/egg-products-preparation/shell-eggs-from-farm-to-table/CT_Index
- ↑ http://www.efsa.europa.eu/en/press/news/140731
- ↑ http://blogs.usda.gov/2013/12/23/a-carton-of-eggs-a-true-bakers-dozen/
- ↑ http://blogs.usda.gov/2013/12/23/a-carton-of-eggs-a-true-bakers-dozen/
- ↑ http://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX:32008R0589
- ↑ http://www.businessinsider.com/should-you-refrigerate-eggs-2014-7
- ↑ http://www.nytimes.com/2010/08/25/business/25vaccine.html?_r=0
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