Abstract
The composition of diesel exhaust was determined by infrared spectra, colorimetry, gas chromatography and fluorescence studies. A group of panelist were enclosed in a room constructed to maintain a constant very low odor level with temperature and humidity control. To establish odor thresholds, experiments were performed using various concentrations of the exhaust gases. Values were determined for CO/sub 2/, CO, NO, NO/sub 2/, SO/sub 2/, C/sub 2/H/sub 4/, C/sub 2/H/sub 2/, acrolein, and formaldehyde. These findings are the first results of a series of psychophysical experiments. The verification of the importance of NO/sub 2/ and CH in the detectability of diesel exhaust requires extensive further odor studies on pure compounds and mixtures.
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