Separation and identification of picogram levels of dioxins and PCBs by GC/cryogenic trapping FTIR

David J. Johnson; Jay R. Powell; K. Krishnan

doi:10.1117/12.166590

31 January 1994 Separation and identification of picogram levels of dioxins and PCBs by GC/cryogenic trapping FTIR

David J. Johnson, Jay R. Powell, K. Krishnan

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166590
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

Capillary gas chromatography/mass spectrometry (GC/MS) has routinely been used by the analytical chemist to separate and identify low levels of environmentally important compounds. A GC/Cryogenic Trapping Fourier Transform Infrared Spectrometer (Tracer) provides the sensitivity of the GC/MS with the added capability of differentiating between compounds of the same mass. In this work, the Tracer was utilized to study low levels of six Polychlorinated Biphenyls (PCBs), eight Chlorinated Dibenzo-p-Doxins and Norflurazon. In all cases, picogram levels of these compounds were easily detected from `on the fly' generated IR chromatograms. Since the separated compounds eluting from the capillary column are cryogenically trapped onto a moving liquid nitrogen cooled ZnSe crystal, excellent signal-to- noise spectra of these same compounds may be collected after the run by returning to the same areas of deposition and signal averaging.

Citation Download Citation

David J. Johnson, Jay R. Powell, and K. Krishnan "Separation and identification of picogram levels of dioxins and PCBs by GC/cryogenic trapping FTIR", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166590

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