Method 1: smell.

If the fungus is not spoiled, there will be a special smell of fungus in the water after the fungus invades the bubble; But if the fungus smells like rotten eggs or other odors, it means it has gone bad and can't be eaten. ?

Method 2: Look at the shape?

The color of fresh auricularia auricula is dark brown or black after soaking, and the front is bright. However, if it is soaked for a long time and deteriorated, its color will change, and its appearance will be dull and bad. At this time, the auricularia auricula can't be eaten. ?

Method 3: Pinch by hand?

If the fungus has been soaked for too long and deteriorated, as long as it is gently pinched by hand, it will rot like a paste, then such fungus can't be eaten. While auricularia auricula is relatively elastic in texture without deterioration, and it is not easy to be soft and rotten. ?

Method 4: Conduct inspection?

Test the auricularia auricula to see if the auricularia auricula has produced biotoxins such as aflatoxin and penicillin and nitrite after soaking for a long time, and judge whether it can still be eaten by testing the content of biotoxins and nitrite in the auricularia auricula.

Shelf life of dried auricularia auricula:

Dried fungus has a shelf life, which can generally be preserved for about two years. The contents of fat and protein in auricularia auricula are relatively low, so it is not easy to cause bacterial reproduction after drying, and it will not produce odor due to oil oxidation. When storing auricularia auricula, it needs to be put in a sealed jar or bag. Isolation of oxygen can delay oxidation and prevent it from getting wet, thus prolonging the storage time. Dried auricularia auricula does not need to be refrigerated or frozen, but generally can be placed in a cool and dry place.