Chemistry
5 years ago

New method detects harmful PCBs in environment at ultra-low levels.

Journal of AOAC INTERNATIONAL
Glass Capillary Gas Chromatography for Sensitive, Accurate Polychlorinated Biphenyl Analysis
Brian Bush, Steven Connor, J. Snow

Paper Summary

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Toxic Aroclor 1221 Mixture Identified: Implications for Environmental Health.

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A method using glass capillary gas chromatography was developed to analyze polychlorinated biphenyls (PCBs) with high sensitivity. By coating the columns with Apiezon L, researchers separated different PCB mixtures and determined their masses accurately. They created a calibration standard from a mixture of Aroclors 1221, 1016, 1254, and 1260, which can be used universally for PCB analysis at very low levels (parts per billion). The method can detect total PCBs at less than 10 ng/mL and individual PCB congeners at less than 0.1 ng/mL.