How to remove the fishy smell from frozen shrimp?

1. Remove the black fishy gland

Remove a black fishy gland on the back of the shrimp (may be the gastrointestinal tract of the shrimp).

Fishy gland: There is a white line on each side of the fish's body, called "fishy gland". The mucus secreted by this mucus gland contains trimethylamine oxide. "Trimethylamine oxide" has certain effects. Umami (the deliciousness of fish meat is the opposite), but after the fish dies, this "trimethylamine oxide" with umami flavor will continue to "deoxygenate" and reduce to "trimethylamine" and diffuse into the air, and the smell will The fishy smell is basically the smell of "trimethylamine". Some odors from the external environment, such as the earthy smell in the water, are directly attached to the fish line through the small holes. Shrimps also have fishy glands on their bodies, for the same reason as fish.

2. Soak in salt water

Soaking the shrimp in salt water for two hours can effectively remove the earthy smell.

The principle of salt removal is mainly based on the principle of salting out, plus the use of osmotic pressure with cold water. The salting out effect of salts and the dilution effect of crystal osmotic pressure are weakened under alkaline conditions and strengthened under acidic conditions.