Shim-pack GIST-HP Amide MF Guard is the guard column for the GIST-HP Amide column. It is the metal free version of the GIST Amide column and is ideal for highly polar compounds as it shows strong rentention for this analytes even more so that other HILIC phases such as silica and diol. It exhibits excellent stability in high aqueous eluent and is suitable for LCMS analysis. This column has no capping, a carbon load of 15%, a pore sizer of 10nm, and a pH range of 2 - 8.5. USP L68.