Polymethacrylate stationary phase (USP L71) for reversed phase and HILIC separations. Exhibits less hydrophobicity and retention than a C18 phase. Wide pH range (2-12) and compatible with 100% aqueous mobile phases. Suitable for the analysis of organic acids. Guard column 220-91524-54 is recommended to prolong the lifetime of the analytical column. Use with PEEK coupler 220-91524-99 (1-piece, double ended) or 220-91524-98 (approx. 3" PEEK tubing and fittings.)