Fiber-optic sensor detects nonaqueous compounds
Scientists have used a fiber-optic sensor that detects scattered light to locate and identify nonaqueous liquids such as gasoline, that have seeped below the ground`s surface. The technique, called Raman spectroscopy, can be used to find both non-aqueous phase liquids - such as gasoline, that float on water, and dense nonaqueous phase liquids - such as the chemical perchloroethylene, or PCE - that sink below water. The in situ Raman spectra of the gasoline clearly showed the relative amounts of different chemical compounds, thus indicating the type of gasoline. The amount of fluorescence in the spectrum seems to be related to the degradation products in the gasoline and, thus, might be some measure of the history of the fuel.
- OSTI ID:
- 160109
- Journal Information:
- Water Environment and Technology, Vol. 4, Issue 11; Other Information: PBD: Nov 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fiber optic spectrochemical emission sensor: Detection of volatile chlorinated compounds in air and water using ultra-thin membranes
CROWTM PROCESS APPLICATION FOR SITES CONTAMINATED WITH LIGHT NON-AQUEOUS PHASE LIQUIDS AND CHLORINATED HYDROCARBONS