b'Ion exchange chromatography resins and membranesWe offer strong cation exchange (SCX) and strong anion exchange (SAX) resins composed of rigid polymeric beads with covalent surface chemistries. The robust manufacturing process yields outstanding physical and chemical stability, allowing easier handling and packing. These high-capacity chromatography media are designed to deliver excellent separation and scale-up capabilities. See Table 3 for recommended products based on application.Thermo Scientific Pierce Strong Cation or Anion Exchange Spin Columns are membrane-based centrifugal devices that eliminate the need for column packing, allow multiple samples to be processed simultaneously, and are ideal for working with low-volume buffer solutions.Table 3. Strong ion exchange purification selection guide.High-throughputHigh-throughput Chemistry Salt tolerance Recommended product screening batch Batch Pilot Process25 mM Pierce Strong Anion Exchange Spin ColumnsStrong anion150 mM POROS HQ resin exchange 50 mM POROS XQ resin Strong cation25 mM Pierce Strong Cation Exchange Spin Columnsexchange 150 mM POROS XS resin Affinity chromatography resinsOur broad menu of resins and formats offers many options for single-step purification of biotinylated or recombinant proteins and antibodies. In addition, customized purification solutions can be designed by the covalent attachment of a ligand to one of our activated supports. Accessory products for all aspects of purification, including disposable columns and binding and elution buffers, are also available.32 Protein purification thermofisher.com/proteinbiology'