Ultisil ^TM Series UHPLC Columns are based on 1.8 µm particle size ultra-pure (purity >99.999%) silica and offer a variety of boned phases, specified guard columns and pre-columns for users to design and realize faster and more environmentally friendly chromatography applications with higher resolution than traditional approaches.  Currently available UHPLC sorbent types include: C-18, LP-C18, XB-C18, AQ-C18, Polar-RP, HILIC, XB-C8 and XB-Phenyl.