Unique Selectivity Separate Positional Isomers Applicable with all HPLC, UHPLC and MS systems No "MS bleed", Stable hydrophobic ligand Speedcore® Diphenyl extends selectivity and can discriminate between closely related species, such as metabolites or excipients. The interactions specific to this stationary phase allow for separation of positional isomers as well as small atom or functional group changes to be resolved.