SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM IN URANIUM METAL, ORES, AND LIQUORS
Procedures which permit the rapid spectrophotometric determination of trace vanadium in uranium metal, ores, and liquors and are well suited to routine analyses are described. The procedure for uranium metal consists of dissolving a sample in HNO/sub 2/ and HClO/sub 4/ and evaporating almost to dryness. A sample of the solution containing up to 50 micrograms V/sub 2/O/sub 5/ is transferred to a 125-ml separatory funnel, and the pH is adjusted to 4.0 with buffer and diluted, if necessary, to 50 ml with water. Then add 5 ml EDTA solution and shake 1 min; add 5 ml Th(NO/sub 3/)/sub 4/ solution and shake for 5 min. Add 20 ml ethanolic 8-quinolinol solution and 20 ml CCl/sub 4/ and shake 2 min allowing phase separation. Pass the lower CCl/sub 4/ phase through dry filter paper. Using 5-cm cells, measure the absorbance of the organic phase at 475 millimicrons against a reagent blank. Calculate the V/sub 2/O/sub 5/ result from a calibration curve. For ores, add 10 g of Na/sub 2/CO/sub 3/- K/sub 2/CO/sub 3/ to a sample and mix thoroughly. Cover the mixture and let it fuse 5 to 10 min. Allow the melt to cool, transfer to a beaker, and boil with water to dissolve the salts. Filter, and proceed with the clear filtrate as above to the separatory funnel. (N.W.R.)
- Research Organization:
- Eldorado Mining and Refining Ltd., Ottawa
- NSA Number:
- NSA-15-022270
- OSTI ID:
- 4047165
- Journal Information:
- Chemist Analyst, Vol. Vol: 50; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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