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Advantages and disadvantages in the use of Fourier Transform Infrared (FTIR) and filter infrared (FIR) spectrometers for monitoring airborne gases and vapors of industrial hygiene concern.
Levine SP; Li-Shi Y; Strang CR; Hong-Kui X
Appl Ind Hyg 1989 Jul; 4(7):180-187
The advantages and disadvantages in the use of Fourier transform infrared (FTIR) spectrometers by the industrial hygienist for the monitoring of airborne gases and vapors were discussed. The differences between FTIR and filter infrared (FIR) instrumentation were addressed with emphasis on the principal components of the spectrophotometers, including the optical system, the sample system, and the data handling and interpretation systems. Actual workplace air monitoring applications were presented to illustrate the relative utility of FTIR systems. Applications included remote sensing at a hazardous waste site, emissions from a chemical vapor deposition furnace, irritating odors from resin regeneration, and trichloroethylene and Freon samples from a degreasing operation. Practical considerations such as speed, size, and cost were addressed. The direction of future research and technical advances were also discussed. The authors predict that smaller and cheaper FTIR systems will become available which will compete with FIR systems for transportable air monitoring applications; the ability to perform real time monitoring using FTIR is a function of resolution, data transfer and computation time, and the number of species to be simultaneously monitored.
NIOSH-Publication; NIOSH-Grant; Analytical-methods; Analytical-instruments; Monitoring-systems; Workplace-monitoring; Infrared-spectrophotometry; Industrial-hygiene; Airborne-particles; Air-quality-monitoring
Environmental & Indust Health School of Public Health II 1420 Washington Heights Ann Arbor, MI 48109-2029
Issue of Publication
Applied Industrial Hygiene
University of Michigan at Ann Arbor, Ann Arbor, Michigan
Page last reviewed: October 26, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division