Chemical Sensing at the Parts Per Trillion Level with a Fiber Optic Sensor
- Sandia National Laboratories
Chemical detection of gaseous species at very low vapor pressures is possible for materials with very low, saturation vapor pressures. A saturation vapor pressure implies equilibrium with the solid or liquid phase of the material. Thus partitioning of the gaseous species into a phase such as a polymer, will result in a very large concentration of the species in the solid phase and greatly enhanced ability to detect this species. The concentration in the polymer of the species to be detected is limited by the volubility of the species in that phase. In this presentation we discuss such a situation were 2-nitro-diphenylamine (2NDPA) is detected in the gas phase at room temperature at the few parts per trillion level.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 7882
- Report Number(s):
- SAND99-1437C; ON: DE00007882
- Country of Publication:
- United States
- Language:
- English
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