Deactivation of Alumina, Activity Super I:

Deactivation allows the chromatographer the flexibility and freedom to deactivate alumina to the precise activity level required for their specific application.  Sorbent Technologies' standardized aluminas are based on a deactivation scale (see chart.)  The deactivation procedure holds true for all three pH levels (Acid, Neutral, Basic.)  These three surface types show an identical initial activity and when deactivated with identical volumes of deactivator (e.g. water) they exhibit the identical lower activity statuses.  The percent of water addition is based upon weight/weight relationships.  Activity level is according to Brockmann.