On the application of Open-Path Fourier Transform Infra-Red spectroscopy to measure aerosols: Observations of water droplets
- Univ. of Washington, Seattle, WA (United States). Dept. of Environmental Health
This paper proposes the application of Open-Path Fourier Transform Infra-Red (OP-FTIR) spectroscopy to measure aerosols. A preliminary experiment conducted in a standard shower chamber generated a condensed water aerosol cloud. The OP-FTIR beam acquired spectra through the cloud of water droplets. The authors matched calculated extinction spectra to measured extinction in the spectral range between 500 and 5,000 wavenumbers by using Mie theory for spherical particles. The results indicate that size distribution parameters may be retrieved from OP-FTIR spectra acquired over a 1 km optical path with reasonable detection limits on the order of 10 {micro}g{center_dot}m{sup {minus}3} for aerosols with optical properties equivalent to water.
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Inst. for Occupational Safety and Health, Rockville, MD (United States)
- DOE Contract Number:
- FC01-95EW55084
- OSTI ID:
- 345146
- Journal Information:
- Environmental Science and Technology, Vol. 33, Issue 7; Other Information: PBD: 1 Apr 1999
- Country of Publication:
- United States
- Language:
- English
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