CHROMABOND^{<SUP>&reg;</SUP>} SiOH-H₂SO₄/SA

Combination phase for SPE analysis of PCBs

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.