Laser induced phosphorescence uranium analysis
A method is described for measuring uranium in aqueous solution comprising: (a) adding phosphoric acid to a sample to convert any uranium present to a uranyl phosphate complex; (b) irradiating the sample with a laser light pulse having a wavelength of 425 nanometers, a bandwidth of 10 nanometers, peak power of 50 kilowatts, and pulse duration of 5 nanoseconds; (c) observing any resultant emissions at a wavelength of 520 nanometers at timed intervals of 10 microseconds duration during the time from 50 to 400 microseconds after the laser light pulse; wherein the natural logarithm of the emission intensity observed in step (c) is plotted as a function of time yielding an intercept value which is directly proportional to uranium concentration independent of variations in absolute emission intensity which are caused by matrix quenching or by the temperature of the aqueous solution.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4599512
- OSTI ID:
- 5334198
- Country of Publication:
- United States
- Language:
- English
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Laser induced phosphorescence uranium analysis
RESOLUTION OF URANIUM ISOTOPES WITH KINETIC PHOSPHORESCENCE ANALYSIS
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ACTINIDE COMPOUNDS
ACTINIDES
AQUEOUS SOLUTIONS
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
GRAPHS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LASER RADIATION
LASER SPECTROSCOPY
LUMINESCENCE
METALS
MIXTURES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORESCENCE
PHOSPHORIC ACID
PHOSPHORUS COMPOUNDS
PULSES
QUANTITY RATIO
RADIATIONS
SOLUTIONS
SPECTRA
SPECTROSCOPY
TEMPERATURE EFFECTS
TIME DEPENDENCE
URANIUM
URANIUM COMPOUNDS
URANYL COMPOUNDS
URANYL PHOSPHATES
WAVELENGTHS