Wash out all water and buffers from bonded silica columns and store in organic solvent. Unbonded silica columns may be stored in hexane, heptane or similar organic solvent. Keep in a cool area and replace end-caps to prevent the packing bed drying out.
Please access the provided link for information on Care & Use of Kromasil HPLC Columns :https://www.kromasil.com/support/care_and_use.php