“…However, these procedures are not only tedious and hazardous but also need additional cleanup steps before measurement with GC in most cases. Liquid chromatography is a relatively simple and reliable technique to separate compounds.Gel permeation chromatography (GPC), 9,10 activated carbon adsorption chromatography, 10,11 and multi-layer silica gel chromatography 4 have been used for PCB cleanup. Combinations of a polar stationary phase and a less-polar solvent (normal-phase liquid chromatography) are also powerful tool for separation of aromatic compounds, such as PCBs and polyaromatic hydrocarbons (PAHs) from matrices.…”