Use of Long-Path FTIR Spectrometry in Conjunction with Scintillometry to Measure Gas Fluxes.
Moore-DI; Dahm-CN; Gosz-JR; Hill-RJ
NIOSH 1991 Feb:541-548
The measurement of gas fluxes by long path Fourier Transform Infrared (FTIR) spectrometry was discussed. Means of combining micrometeorological data with long path trace gas concentrations to obtain estimates of fluxes were described. The system was field portable and was able to measure gas concentrations at up to a 1 kilometer path length. The long path FTIR was tested for monitoring gases from natural and anthropogenic origins. Gas emissions were measured over a 100 meter path above a shallow lake in New Mexico before and after bottom sediments were disturbed. Air quality was monitored over a path of about 500 meters in metropolitan Albuquerque, New Mexico for a period extending from rush hour through the period of peak fireplace smoke emission. Combining long path scintillometry with long path FTIR gas concentration data promised a better tool for quantifying gas fluxes from both natural and polluted sources. The advantage of such a system was that it can analyze samples virtually in real time for myriad compounds simultaneously without introduction of any artifacts from sample collection.
Spectrographic-analysis; Air-monitoring; Toxic-gases; Environmental-pollution; Climatic-factors; Air-contamination; Air-quality-monitoring; Automotive-emissions; Combustion-products;
Field Screening Methods for Hazardous Wastes and Toxic Chemicals. Second International Symposium, February 12-14, 1991. Sponsored by U.S. EPA; U.S. DOE; U.S. Army Toxic and Hazardous Materials Agency; U.S. Army Chemical Research Development and Engineering Center; U.S.A.F.; Florida State Univ.; National Environmental Technology Applications Corp.; and NIOSH