Waters XSelect HSS T3 is a low-coverage C18 phase compatible with 100% aqueous mobile phase and should be first choice for polar and non-polar compounds.
Waters XSelect CSH Phenyl-Hexyl with trifunctionally bonded C6 phenyl-ligand is a robust, low bleed sorbent that selectively retains polyaromatic compounds through pi-pi interactions
Waters XSelect HSS Cyano column is a low coverage, unendcapped, highly stable cyano phase that provides low hydrophobicity for the rapid elution of hydrophobic analytes