High-resolution Separations of Explosives and Related Compounds Purospher® RP-18 HC HPLC column is a non-endcapped stationary phases, designed for high-resolution separations of explosives and related compounds. The column allow the determination of traces of explosives in soil and water samples, in combination with solid-phase extraction. This is of great importance for applications such as hazardous waste site characterization With the Purospher® RP-18 HC HPLC column, microbial transformation products of TNT (2-amino-4,6-dinitrotoluene [2-Am-DNT] and 4-amino-2,6-dinitrotoluene [4-Am-DNT]), and manufacturing impurities of TNT (2,4-DNT, 2,6-DNT, and 1,3-DNB) can be easily separated from each other. The columns are also suitable for the separation of piric acid from hexyl, and ethylene glycol dinitrate (EGDN) from diethylene glycol nitrate (DEGN).