Fortis C18 will provide excellent peak shape, retention and resolution for a whole range of compound types. Fortis C18 high surface area combined with the optimised bonded ligand provides high retention for compounds. This is an advantage in a number of ways: More organic modifier can be used to provide elution, therefore greater MS sensitivity. Higher organic leads to quicker “dry-down” times in fraction collection. Higher retention of analytes, gives more chance of resolution..