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Proceedings Paper

Fiber optic infrared reflectance probe for detection of hydrocarbon fuels in soil
Author(s): Kenneth James Ewing; Tom G. Bilodeau; Gregory M. Nau; Ishwar D. Aggarwal; T. King; Roger Clark; George E. Robitaille
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Paper Abstract

The acquisition of fiber optic reflectance spectra of diesel fuel marine (DFM) dispersed on sea sand is described. Reflectance spectra are acquired by collection of the diffusely scattered light from a black body source imaged onto a specially designed sample cell. Samples of DFM were prepared by diluting a stock standard containing 10 wt% DFM on sea sand. Interactive band analysis is used to remove the background absorption due to residual water on the sand. Results indicate a linear relationship between the band depth at 3.68 microns and the concentration of DFM. Statistical analysis of ten replicate measurements of a 0.02 wt% DFM on sea sand gives the average band depth and 95% confidence interval of 0.02875 +/- 0.000654. An instrumental detection limit of 0.0033 percent reflectance is calculated from the standard deviation of the replicate measurements.

Paper Details

Date Published: 19 January 1995
PDF: 7 pages
Proc. SPIE 2367, Optical Sensors for Environmental and Chemical Process Monitoring, (19 January 1995); doi: 10.1117/12.199674
Show Author Affiliations
Kenneth James Ewing, Naval Research Lab. (United States)
Tom G. Bilodeau, Naval Research Lab. (United States)
Gregory M. Nau, Naval Research Lab. (United States)
Ishwar D. Aggarwal, Naval Research Lab. (United States)
T. King, USGS Geophysics Branch (United States)
Roger Clark, USGS Geophysics Branch (United States)
George E. Robitaille, U.S. Army Environmental Ctr. (United States)


Published in SPIE Proceedings Vol. 2367:
Optical Sensors for Environmental and Chemical Process Monitoring
Ishwar D. Aggarwal; Stuart Farquharson; Eric Koglin, Editor(s)

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