||Application of Matrix Isolation Infrared Spectroscopy to Analysis for Polynuclear Aromatic Hydrocarbons in Environmental Samples.
Wilson, N. K. ;
Childers, J. W. ;
Barbour, R. K. ;
||Northrop Services, Inc., Research Triangle Park, NC.;Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Infrared spectroscopy ;
Aromatic polycyclic hydrocarbons ;
Gas chromatography ;
Quantitative analysis ;
Chemical analysis ;
Exhaust emissions ;
Fourier transformation ;
Matrix isolation ;
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Gas chromatography combined with matrix isolation infrared spectroscopy (GC/MI-IR) enables identification and quantification of components of complex mixtures by infrared spectroscopy at levels of a few nanograms. These levels are several orders of magnitude lower than those achieved by light pipe-based infrared measurements. Researchers used GC/MI-IR to identify polynuclear aromatic hydrocarbons in extracts of several types of air samples, including ambient air particulate matter, diesel engine exhaust, and wood smoke. Included are examples of these analyses and a discussion of the on-going research using MI-IR for identification of unknown compounds associated with the highly mutagenic fractions of air samples.