H2SO4: H2SO4-impregnated silica phase for oxidation of accompanying compounds to ionic and/or polar compounds. SA: strongly acidic cation exchanger based on silica with benzenesulphonic acid modification for removal of ionic and sulphur-containing compounds.
Recommended application: extraction of PCBs from oil with reference to German industrial standard DIN 51527, part 1. This combination column is used together with a SiOH column.
