Quantitative characterization of polychlorinated biphenyl mixtures (aroclors® 1248, 1254 and 1269) by gas chromatograpy using capillary columns

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Structural identification of polychlorinated biphenyls in commercial mixtures by gas-liquid chromatography, nuclear magnetic resonance and mass spectrometry

D. Sissons, D. Welti (1971)

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Inductive effect of polychlorinated biphenyls mixture and individual isomers on the hepatic microsomal enzymes.

NAOKI OZAWA, HIDETOSHI YOSHIMURA, SEITARO SAEKI (1978)

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Comparison of the compositions of Aroclor 1242 and Aroclor 1016.

Craig Parker, P W Albro (1979)

The complete polychlorinated biphenyl compositions of two American products, Aroclor 1242 and its more modern replacement, Aroclor 1016, have been determined by gas-liquid chromatography (GLC) on twelve liquid phases of differing selectivities. Attempts were made to determine the degree of contamination of these Aroclors with chlorinated naphthalenes, using GLC with multiple ion-monitoring mass spectrometry. Chlorinated dibenzofurans, indetectable in Aroclor 1016, were tentatively identified by negative chemical-ionization mass spectrometry and their retention times relative to dieldrin on two GLC liquid phases. Quantitation of the dibenzofurans was initially accomplished using an electron-capture detector, and confirmed by negative chemical-ionization mass spectrometry. Aroclor 1242 contained less than 0.05 mol.% chloronaphthalenes, while Aroclor 1016 contained less than 0.06 mol.% of these compounds. Aroclor 1242 had approximately 150 ppb of chlorinated dibenzofurans, of which 43% was the toxic 2,3,7,8-tetrachloro isomer.