Polymeric strong-base anion exchange packing with limited porosity for separation of proteins

• Fast Separation of large proteins

• pH stable from 0 to 9

• Higher sample capacity than nonporous supports

Product Features

• One particle size: 7 µm

• Custom hardware dimensions available

Sample Recovery

Sample recovery is excellent with PRP-X500 columns. The limited permeability prevents proteins from entering the pores and unfolding (a cause of ghosting).

Controlling Sample Retention

Applications#159 and #161 illustrate gradient separations on a PRP-X500 column. Mobile phases were buffered with TRIS, tris(hydroxymethyl)aminomethane at pH 8 or 9, and the proteins were eluted with a sodium chloride gradient. Other mobile phases such as phosphate, borate and lithium or potassium halides are also suitable for use on PRP-X500 columns. When additional resolution is needed, the gradient rate and mobile phase pH can be altered. When the isoelectric point (pI) of the proteins differ significantly, a mobile phase pH adjustment is very effective. Proteins will elute very early when the pH of the mobile phase is lower than its pI and later when the pH of the mobile phase is higher. A reduction in the gradient rate and range also improves chromatographic resolution.

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