Waters Introduces New Ion-Exchange Columns for Protein Characterization 01 Mar 2010: Waters Corporation introduces its new Protein-Pak™ Hi Res, Ion-Exchange (IEX) columns designed for use with Waters ACQUITY® UltraPerformance LC® (UPLC) System for the analysis of biomolecules including monoclonal antibodies, recombinant proteins, DNA/RNA, and vaccine components. Waters