If it is an unopened preserved egg, it must be eaten within 1-2 hours. Don't be exposed to the air for a long time, and don't put it in the refrigerator for the next meal, otherwise it is easy to get salmonella.
Preserved eggs are made by soaking eggs in alkaline substances and solidifying them into colloid, and their water content is about 70%. If preserved eggs are frozen, water will gradually freeze. When the preserved eggs are taken out for eating, the ice cubes gradually melt, and their gum will become honeycomb, which not only changes the original flavor of preserved eggs, but also reduces the edible value. Low temperature will also affect the color of preserved eggs, which is easy to turn yellow.
Extended data:
Precautions:
1, preserved eggs have some unique nutritional functions, but you must not eat more.
2. If the preserved eggs are out of date, never eat them, especially in summer. Try to eat them at that time.
3. When purchasing preserved eggs, it should be noted that the protein of preserved eggs is dark brown transparent body after peeling, which has certain toughness, while the polluted preserved eggs are light green with poor toughness and easy to loosen. Such preserved eggs must not be eaten.
4, children should eat less preserved eggs, lead-free preserved eggs are delicious and nutritious, but children are in a stage of vigorous physical development, and the harmful reaction to lead is obvious, so it is better to eat less.
Baidu encyclopedia-preserved eggs
Baidu Encyclopedia-Preservation at Normal Temperature