Abstract
Multimode gas-phase spectrometric measurements of gas chromatography (GC) eluates are made concurrently in a long pathlength cell. The 167-mm cell resulted in up to ten-fold improvements in limits of detection of GC eluates by UV absorbance relative to previous detectors. The concurrent measurement of UV fluorescence in the same cell provides highly selective detection for multi-ring polynuclear aromatics in addition to the selectivity of the absorbance measurement. Limits of detection for aromatic compounds range to low nanogram levels for the multimode detector.
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