The GIST C18 consists of highly inert, endcapped packing material for symmetrical peaks and long lifetime. This dimension is recommended as the delay column for PFAS analysis by LCMS. USP L1, 100A pore size, 350 m2/g surface area, 14% carbon load, pH range 1-10, fully endcapped. Maximum pressure 45 MPa/450 bar/6,500 psi.