A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores
Trace Elements Investigations
47
By: F. S. Grimaldi and Harry Levine
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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.
| 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 |
| Edition | - |
| Year Published | 1950 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 7 p. |
| Google Analytic Metrics | Metrics page |