Apparatus and method for uranium determination

Details Apparatus and method for uranium determination Apparatus and method for uranium determination

1978-02-21

1980-04-15

Smith, Alfred E.

Radiant energy

Luminophor irradiation

Methods

250255, 250461R, G01N 2138, G01V 500, G01J 158

Patent

active

041985680

ABSTRACT:
A method of detecting uranium compounds in an aqueous sample, containing uranium compounds that phosphoresce in response to ultraviolet light and other compounds which luminesce but have a shorter lifetime of phosphorescence than uranium compounds comprising the steps of increasing the phosphorescent characteristics of the uranium compounds and simultaneously diminishing the quenching efficiency of interfering ions in the sample by adding a polyphosphate compound and a buffer; projecting ultraviolet light into the sample; terminating said projection of ultraviolet light into the sample; measuring intensity of the decaying uranium phosphorescence at a time delay after the termination of the ultraviolet light, the time delay being longer than the time for luminescence due to materials other than uranium compounds possibly in the sample to substantially decay.

REFERENCES:
Vernon Hodge et al., "Semi-Quantitative Determination of Uranium, Plutonium and Americium in Sea Water," Analytical Chemistry, vol. 47, No. 11, Sep. 1975, pp. 1866-1868.

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