For ultra-high resolution and efficiency when separating protein variants, use Thermo Scientific™ ProPac™ SAX-10 LC columns. With a pressure-stable, nonporous 10 µm core particle, ProPac columns can resolve isomers that differ by only one charged residue. The thin hydrophilic layer prevents unwanted secondary interactions. The grafted anion exchange surface provides pH-based selectivity control and rapid mass transfer, resulting in efficient separations and moderate capacity.