Remote detection of nitrocompounds by laser-induced fluorescence
- Univ. of Iowa, Iowa City, IA (United States)
Localized contaminations of subsurface soil and water by nitrocompounds is an environmental problem of great concern to the Department of Defense. Pollution by these materials is problematic because of the mutagenic and carcinogenic properties of not only the parent compounds, but also their microbial degradation products. Leaching of high explosives from munitions is the primary source of this contamination as nearly all high explosives include the nitro-(NO{sub 2}-) functionality in their molecular structure. Remediation of this problem is difficult, however, as there are no techniques available for the remote detection of these compounds. Currently emphasis is on the development of fiber optic coupled sensors which can be implemented in existing cone penentrometer (CPT) systems. Photofragmentation approaches are well suited to detecting classes of molecules and have been shown to be a very effective strategy for detecting nitrocompounds, especially when the NO fragment is targeted for detection. We are investigating a photofragmentation/laser-induced fluorescence (PF/LIF) approach for the remote detection and measurement of nitrocompounds that is fully compatible with fiber optic coupling. In our studies, single wavelength excitation has been used to (i) photofragment the parent compounds and (ii) probe the resulting photofragments to detect NO. Various wavelength schemes have been evaluated. Results will be presented to demonstrate the feasibility of a PF/LIF based sensor for the remote detection of nitrocompounds.
- OSTI ID:
- 466511
- Report Number(s):
- CONF-951017-; TRN: 96:005999-0043
- Resource Relation:
- Conference: 22. annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Cincinnati, OH (United States), 15-20 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of FACSS XXII - the 22nd annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies; PB: 285 p.
- Country of Publication:
- United States
- Language:
- English
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