PHOTOMETRIC DETERMINATION OF TRACE OF IRON IN URANIUM METAL (in Japanese)
Determination of a trace of iron contained in uranium metal was made by the spectrophotometric method with 1.10-phenanthroline. In application of the method, influences of coexisting uranium are examined. In one procedure the sample is dissolved in hydrochloric acid and hydrogen peroxide. The solution is evaporated to dryness on the steam bath and dissolved in water. Hydroxylamine hydrochloric acid, acetic acid, ammonium acetate, and 1,10phenanthroline solutions are then added. The red color of 1,10-phenanthroline ferrous complex is measured by the light transmittancy of the sample solution at 508 m mu . In this case 10 to 300 ppm of iron in uranium metal can be determined under the coexistence of uranium. In another procedure the sample is dissolved in hydrochloric acid and hydrogen peroxide. Ferric iron is reduced to ferrous by sodium thiosulfate. Uranium is separated by TBP -- C/sub 6/H/sub 6/ extraction. Ferrous iron is oxidized again by adding hydrogen peroxide and bromine water and is extracted with TBP-C/sub 6/H/sub 6/. Iron is back-extracted with water from organic layer and then spectrophotometrically determined in the same way as in the first procedure. In this method 2 to 60 ppm of iron can be determined. This method of seperation, examined by using Fe/sup 55+/s/sup 9/ as a tracer, was found to be adequate for the purpose. (auth)
- Research Organization:
- Nagoya Univ., Japan
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-010876
- OSTI ID:
- 4093596
- Report Number(s):
- CEA-tr-X-446
- Journal Information:
- Japan Analyst, Journal Name: Japan Analyst Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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