Bio-Rad ENrich™ High-Resolution Size Exclusion Columns - Manual (Page 13)

ENrich SEC Instruction Manual 9
3.5 Storage Conditions
To prevent bacterial growth in the column, it must be stored
correctly. For short-term storage (up to 2 days), store it in freshly
prepared buffer. For long-term storage, first wash the column
with 30 ml of deionized water and then with a storage solution of
20% ethanol. Use a flow rate of 0.5 ml/min or less. Ensure that
the backpressure stays below the maximum operating pressure.
Always store the column with plugs at each end. Store the column
in a safe place at room temperature or 4°C. Never allow the
column to freeze.
If, during storage or shipment the column might be exposed to
temperatures above 35°C, briefly (3 min under vacuum) degas the
20% ethanol storage solution before use.