About three days. After the pineapple is soaked in salt water, the unfinished part should be drained quickly, put into a well-sealed fresh-keeping bowl or bag, and put into the refrigerator for preservation, which can be preserved for about 3 days without deterioration. Be careful not to keep tasting during the period, otherwise the fresh-keeping time will be shortened after entering the bacteria. Once the fresh-keeping bag or bowl is opened, it should be eaten as soon as possible.

Pineapples need to be soaked in salt water for several minutes: about 15-30 minutes. The soaking time of pineapple in salt water is too short to eliminate bromelain in salt water. At the same time, salt water did not enter the pineapple pulp, and it could not improve the taste of pineapple. But soaking for too long will affect the taste of pineapple. It is suggested that the salt water soaking time should be controlled at 15-30 minutes. For pineapple with high maturity, it can be soaked for about 15 minutes. For pineapples with low maturity, it is recommended to soak them more.