Laser induced phosphorescence uranium analysis

Details Laser induced phosphorescence uranium analysis Laser induced phosphorescence uranium analysis

1983-06-10

1986-07-08

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

356318, G01N 2164

Patent

active

045995125

ABSTRACT:
A method is described for measuring the uranium content of aqueous solutions wherein a uranyl phosphate complex is irradiated with a 5 nanosecond pulse of 425 nanometer laser light and resultant 520 nanometer emissions are observed for a period of 50 to 400 microseconds after the pulse. Plotting the natural logarithm of emission intensity as a function of time yields an intercept value which is proportional to uranium concentration.

REFERENCES:
patent: 4198568 (1980-04-01), Robbins et al.
patent: 4236071 (1980-11-01), Chimenti
patent: 4239964 (1980-12-01), Robbins et al.
patent: 4365153 (1982-12-01), Seigel et al.
patent: 4464568 (1984-08-01), Brown et al.
Felix, "Breakthrough in Uranium Bioassay", Health Physics Society Newsletter, Jan. 1983, p. 3.
Robbins, "No Breakthrough", Health Physics Society Newsletter, Mar. 1983, p. 4.
Bushaw, "Author's Response", Health Physics Society Newsletter, Mar. 1983, p. 5.
Benson et al, "Concentration and Temperature Quenching of the Excited State of the Uranyl Ion in Aqueous Solution by Laser Flash Photolysis", Chem. Phys. Letters, vol. 35 (2), Sep. 1, 1975. pp. 195-197.

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