What is "salting out"

n. 1 (context chemistry English) The precipitation of a solute by the addition of an electrolyte 2 (context biochemistry English) a technique for the separation of proteins by differential precipitation in a solution of sodium chloride or ammonium sulphate

Salting out (also known as antisolvent crystallization, precipitation crystallization, or drowning out) is an effect based on the electrolyte-nonelectrolyte interaction, in which the non-electrolyte could be less soluble at high salt concentrations. It is used as method of separating proteins. The salt concentration needed for the protein to precipitate out of the solution differs from protein to protein. This process is also used to concentrate dilute solutions of proteins. Dialysis can be used to remove the salt if needed.