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Remote Detection of Trichloroethylene in Soil by a Fiber-Optic Infrared Reflectance Probe

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A remote detection method for measuring the infrared reflectance from chlorinated hydrocarbons in soils is demonstrated. The method uses a 12-m-long, field-ruggedized, chalcogenide fiber to transmit IR reflectance data to a remotely located FT-IR spectrometer. Minimum observable signal corresponding to 250 ppm of trichloroethylene (TCE) in sand was measured with the system. Suggestions for improving the threshold detection limit are offered.

Keywords: Chlorinated hydrocarbons; Fiber-optic chemical sensors; Remote FT-IR spectroscopy; Soil analysis

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702963905240

Affiliations: 1: Naval Research Laboratory, Code 5675, Washington, D.C. 20375 2: Naval Research Laboratory, Code 5675, Washington, D.C. 20375; permanent address: Maryland University Research Foundation, Greenbelt, MD 20770

Publication date: August 1, 1996

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