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Detection of trace levels of water

United States Patent Application

20020118364
A1
View the Complete Application at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Methods and apparatuses for detecting low levels of a substance of interest in a sample using photoacoustic spectroscopy are provided. This method comprises exciting the sample with light having a wavelength that is absorbed by the substance of interest; generating an acoustic wave within the sample; detecting the acoustic wave; and determining the amount of the substance of interest present in the sample. The method can be used to detect the amount of water in an oil sample at detection limits lower than currently available.
Amonette, James E. (Richland, WA), Autrey, S. Thomas (West Richland, WA), Foster-Mills, Nancy S. (Richland, WA), Wilson, Bary W. (Richland, WA)
09/ 745,029
December 20, 2000
[0001] This invention was made with Government support under Contract DEAC0676RL01830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.