Separation of Thorium by Anion Exchange
Two methods are described for the separation of thorium from a number of elements by a two-cycle anion exchange. The first method utilizes the adsorption of the negatively charged nitrate complex of thorium on the strongly basic anion exchanger Dowex 1-X8 (nitrate form) from a solution consisting of 90% methanol and 10% 5N nitric acid. All elements except barium, lead, bismuth, lanthanum, and rare earth elements, which are also adsorbed, can be separated from thorium quantitatively. To separate thorium from these elements (except bismuth) a second ion exchange method was employed, based on the fact that thorium at pH 4 forms a negatively changed ascorbinate complex which is strongly adsorbed on Dowex resin 1-X 8 (ascorbinate form), whereas the accompanying elements pass into the effluent unadsorbed. Thoronol was used as a colorimetric reagent for the spectrophotcmetric determination of thorium.
- Research Organization:
- Universitat, Vienna
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-024824
- OSTI ID:
- 4022809
- Journal Information:
- Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 9 Vol. 33; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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