Preserved eggs that have not been opened can generally be stored for 3-5 months. If they have been opened, they must be eaten within 1-2 hours. Do not expose them to the air for a long time or keep them in the refrigerator for the next meal, otherwise they are prone to Salmonella infection.
The shelf life of Songhua eggs packaged and sold in supermarkets is mostly marked with a shelf life of 180 days. It takes 60-70 days for normal Songhua eggs to be pickled in a smooth tank to mature. After they are placed out of the tank for 30 days, the flavor reaches the best, and the pungent ammonia flavor will appear after a long time. The mud wrapped around him has no effect on the shelf life.
Preserved eggs are not only delicious food, but also have certain medicinal value. Traditional Chinese medicine believes that preserved eggs are cool and can cure eye pain, toothache, hypertension, tinnitus, dizziness and other diseases. The public can eat, and the fire is the best; Children, deficiency of Spleen Yang and dysentery due to cold and dampness should eat less.
Some families keep preserved eggs in the refrigerator or even freeze them, thinking that they can be stored for a long time without deterioration. In fact, on the contrary, preserved eggs are soaked in alkaline substances and become colloidal, containing about 70% water. After freezing, the water will gradually freeze. At this time, take out the Songhua egg to eat, the ice will gradually melt, and its colloid will become honeycomb, which changes the original mellow and fragrant flavor of Songhua egg and reduces the edible value. Moreover, low temperature will make the color of Songhua egg yellow and taste hard, which is very different from normal Songhua egg. Therefore, preserved eggs are not suitable for storage in the refrigerator.