title: Separation and quantitation of 3,3',4,4'-tetrachlorobiphenyl and 3,3',4,4',5,5'-hexachlorobiphenyl in aroclors using florisil column chromatography and gas-liquid chromatography.
mesh_terms: D001140:Aroclors / Q000032:analysis*; D002849:Chromatography, Gas; D002852:Chromatography, Ion Exchange; D013058:Mass Spectrometry; D008722:Methods; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000302:isolation & purification*
chemical_list: D001140:Aroclors; D011078:Polychlorinated Biphenyls