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A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores

Trace Elements Investigations 47
By:  and 
https://doi.org/10.3133/tei47

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Abstract

A simple and very rapid fluorimetric procedure is described for the determination of uranium in low-grade shale and phosphate ores. The best working range is from 0.001 to about 0.04 percent U. The procedure employs batch extraction of uranium nitrate by ethyl acetate, using aluminum nitrate as the salting agent, prior to the visual fluorimetric estimation. The procedure is especially designed to save reagents; only 9.5 g of aluminum nitrate and 10 ml of ethyl acetate being used for one analysis. The solution of the sample by means of a fusion with NaOH-NaNO3 flux is rapid. After fusion the sample is immediately extracted without removing silica and other hydrolytic precipitates. Aluminum nitrate very effectively ties up fluoride and phosphate, thus eliminating steps required for their removal.

Suggested Citation

Grimaldi, F.S., Levine, H., 1950, A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores: U.S. Geological Survey Trace Elements Investigations 47, 7 p., https://doi.org/10.3133/tei47.

Publication type Report
Publication Subtype USGS Numbered Series
Title A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores
Series title Trace Elements Investigations
Series number 47
DOI 10.3133/tei47
Year Published 1950
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 7 p.
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