HxSil C8 Analytical Guard Column Starter Kit (1 holder, 2 cartridges), Stainless SteelSilica packing material for a variety of reversed phase separations Hamilton HxSil C8 columns are well end capped for retention time reproducibility and durability. The C8 demonstrates excellent selectivity needed for complex sample mixtures and gives shorter retention times than a C18. Application Examples: Polycyclic aromatic hydrocarbons, small organic molecules. HxSil C8 Overview Alkylated silica is used for reversed phase HPLC columns. Hamilton