DETERMINATION OF THORIUM PRESENT IN FLUORIDE SALT MIXTURES
Three analytical procedures using EDTA titrations are developed for the determination of thorium in (1) fluoride salt mixtures, (2) fluoride salt mixtures containing cerium, and (3) fluoride salt mixtures containing only a micro amount of thorium. In (1) and (2), fluoride is removed as BF/sub 3/; in (1) and (3), back-titration of excess EDTA with copper(II) solution is employed to counteract the effect of high salt concentrations, while direct titration with EDTA is used after extraction of thorium from cerium with trioctylphosphine oxide and subsequent back-extraction with 0.3 M H/sub 2/SO/sub 4/. In all cases, xylenol orange is used as an indicator for the titrations, and coefficients of variation of 0.8 to 1.3% are obtained. (D.L.C.)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-14-015613
- OSTI ID:
- 4184718
- Journal Information:
- Chemist Analyst, Journal Name: Chemist Analyst Vol. Vol: 49
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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