Ion Exchange HPLC: Phenomenex
Ion exchange chromatography is used to retain charged analytes
Ion Exchange HPLC

Ion-exchange (IEX) chromatography involves interactions between a charged stationary phase and the oppositely charged mobile analytes. In cation-exchange chromatography positively charged molecules are attracted to a negatively charged stationary phase. Likewise, in anion-exchange chromatography negatively charged molecules are attracted to a positively charged stationary phase.

Ion-exchange (IEX) chromatography is useful for a wide variety of compounds, such as acidic (anionic) and basic (cationic) small molecules up to peptides and proteins.

Strong Cation Exchange Phase for Ion Exchnage Chromatography (IEX)
Brand Description:
Luna SCX Strong selectivity for positively charged compounds
bioZen WCX Efficient weak cation exchnage phase that allows you to separate proteins (especially monoclonal antibodies) from acidic/basic variants