Elution

noun

1. A washing out; any process by which bodies are separated by the action of a solvent; specifically, a process of recovering sugar from molasses, which consists in precipitating the sugar as sucrate of lime, insoluble in cold water, and washing it free from soluble impurities.
2. The process of removing materials that are absorbed with a solvent.
3. the process of extracting one material from another by washing with a solvent to remove adsorbed material from an adsorbent (as in washing of loaded ion-exchange resins to remove captured ions); used to obtain uranium ions