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https://hdl.handle.net/11681/11657| Title: | Preliminary development of a fiber optic sensor for TNT |
| Authors: | University of New Hampshire. Dept. of Chemistry. U.S. Army Toxic and Hazardous Materials Agency. Zhang, Yuke Seitz, W. Rudolf Sundberg, Donald C. Grant, Clarence L. |
| Keywords: | Contaminated soils Sensor Fiber optics Trinitrotoluene |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 88-4. |
| Description: | Special Report Abstract: Research aimed at the development of a fiber-optic based sensor is described for in-situ detection of TNT in groundwater. Three approaches were evaluated in depth. All three involved use of a material to concentrate TNT in the field of view of an optical fiber. The materials tested were 1) a concentrated dextran solution isolated by a semi-permeable membrane; 2) a pre-swollen cross-linked polyvinyl alcohol polymer; and 3) an amine-loaded PVC membrane. Another approach based on the formation of a colored-TNT anion at high pH was also considered. The amine-loaded PVC membrane appears to have the most promise. Clear membranes were prepared which reacted with TNT to form a colored product. Measurement is made at 520 nm which is very convenient for fiber optic-based sensing. Various primary amines were assessed. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/11657 |
| Appears in Collections: | Special Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SR-88-4.pdf | 1.05 MB | Adobe PDF |  View/Open |