SecurityGuard cartriges: C18, C12, C8, C5, C1, Silica, NH2, CN, Phenyl, SCX, SAX, RP-1, Polar-RP,Fusion-RP, C18 Aq, Widepore C18, Widepore C5, Widepore C4, GFC-2000, GFC-3000, GFC-4000, Carbo-H+, Carbo-Ab+, Carbo-Pb+2, Carbo-Ca+2. Special precolumns on request.