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APPLYING OPEN-PATH OPTICAL SPECTROSCOPY TO HEAVY-DUTY DIESEL EMISSIONS
Citation:
Harris*, D B. AND D. F. Natschke. APPLYING OPEN-PATH OPTICAL SPECTROSCOPY TO HEAVY-DUTY DIESEL EMISSIONS. Presented at A&WMA Annual Conference and Exhibition, Indianapolis, IN, June 22 - 26, 2004.
Impact/Purpose:
To inform the public.
Description:
Non-dispersive infrared absorption has been used to measure gaseous emissions for both stationary and mobile sources. Fourier transform infrared spectroscopy has been used for stationary sources as both extractive and open-path methods. We have applied the open-path method for both across road and roadway plume measurements. The short path used across a road minimizes the interference from water and yields data on compounds previously obscured by water band providing these compounds are at high concentrations. Our previous "quick look" tests had indicated diesel exhaust emissions could be detected using this short path. We present the results of a rigorous test to confirm these data.