THE DETERMINATION OF URANIUM IN GRASS
>A suitable weight of the grass is wet oxidized by means of nitric acid (sp.gr. l.42) and sulfuric acid (sp.gr. 1.84). The silica present is removed by treating with 40% hydrofluoric acid and the uranium present coprecipitated along with added iron by addition of ammonia solution The precipitate is re-dissolved in nitric acid (1 + 7) and taken to low bulk. The acid solution is the aqueous solution extracted with ether for two hours. The ether is evaporated off, the solution evaporated to dryness re-dissolved in nitric acid, and extracted again with ether for 1 1/2 hours. The ether is then evaporated off and the solution heated to dryness with nitric and perchloric acids. The residue is then taken up in sulfuric acid (1 + 17) neutralized with sodium hydroxide and then poured into a mixed solution of sodium hydroxide and sodium pyrophosphate. The uranium is then determined absorptiometrically with hydrogen peroxide. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Industrial Group. Springfields Works, Springfields, Lancs, England
- NSA Number:
- NSA-13-017821
- OSTI ID:
- 4263181
- Report Number(s):
- SCS-M-400
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACIDITY
AMMONIA
BIOCHEMISTRY
CHEMICAL REACTIONS
CHEMISTRY
ETHERS
EVAPORATION
GRASS
HYDROFLUORIC ACID
HYDROGEN PEROXIDES
IRON
MEASURED VALUES
NITRIC ACID
OXIDATION
PERCHLORIC ACID
PLANTS
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
RESIDUES
SEPARATION PROCESSES
SILICON OXIDES
SODIUM HYDROXIDES
SODIUM PHOSPHATES
SOLUTIONS
SOLVENT EXTRACTION
SULFURIC ACID
URANIUM
WATER