title: Analytical response of polychlorinated biphenyl homologues and isomers in thin-layer and gas chromatography.
abstract: Except for pure synthetic polychlorinated biphenyl (PCB), estimation methods of PCB by thin-layer and gas chromatography with electron capture detection give comparable results. Both give a good estimate of the true mass of a biologically modified residue, but where mostly hexachlorobiphenyls and above make up the residue, the estimate will be up to 50% too high. The Coulson detector does not, in our hands, yield comparable results with modified residues: the reason for this difference is not clear at present.
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation; D002855:Chromatography, Thin Layer; D004583:Electrons; D013058:Mass Spectrometry; D008722:Methods; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D013223:Statistics as Topic
chemical_list: D011078:Polychlorinated Biphenyls