Capto adhere is a strong anion exchanger with multimodal functionality. The multimodal functionality gives a different selectivity compared to traditional anion exchangers. Capto adhere is designed for post-protein A purification of monoclonal antibodies. Removal of leached protein A, aggregates, host cell proteins, nucleic acids, and viruses from monoclonal antibodies is performed in flowthrough mode at which the antibodies pass directly through the column while the contaminants are adsorbed. For optimal performance of Capto adhere, screening/optimization of loading conditions are required.