Trace uranium: its measurement by time-resolved fluorescence

Technical Report · Fri Jul 15 00:00:00 EDT 1977

DOI:https://doi.org/10.2172/7210577· OSTI ID:7210577

Stephens, F. B.; Haugen, G. R.; Richardson, J. H.

An investigation was undertaken to extend the limits of detection of uranium in natural waters to the parts-per-trillion (10/sup 12/) level using a laser-induced fluorescence technique. Observations of the time-resolved fluorescence spectrum were made using two techniques--boxcar integration and a pulse counting technique. Neither technique provided greater sensitivity into the parts-per-trillion range. This has been attributed to the long fluorescence lifetime (approximately 55 ..mu..sec) of uranyl ion that results in a low fluorescence pulse density in the measured signal.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7210577
• Report Number(s): UCID-17549
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ACTINIDES
CHEMICAL ANALYSIS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
HYDROGEN COMPOUNDS
LASER RADIATION
METALS
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
SENSITIVITY
SPECTROSCOPY
TRACE AMOUNTS
URANIUM
WATER