DETERMINATION OF IMPURITIES IN THORIUM AND ITS COMPOUNDS BY THE CHEMICO- SPECTRO-GRAPHIC METHOD (in Russian)
Two modifications of the chemico-spectrographic method were worked out for the determination of impurities in thorium and its compounds. According to the first, the concentration of admixtures is carried out by separating thorium as oxalate in a weak nitric acid medium; the enrichment coefficient is 20 to 30. In the second, the concentration of admixtures is carried out by separating thorium from a weak nitric acid solution as peroxide with the enrichment coefficient equal to 2.5 to 5. In both cases the powdery concentrate with beryllium oxide is analysed spectrographically by exciting spectra in a d-c arc and photographing them on a quartz spectrograph with a medium dispersion. By the first method the following 18 elements are determined on a single spectrogram: Mg, Ca, Ba, Al, Ti, V, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, Sn, Sb; by the second method-15 elements: Mg, Ca, Ba, Al, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, and Pb. Due to the concentration of impurities the sensitivity of their determination increases correspondingly (up to 10/sup -4/ to 10/sup -5/%). (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-019346
- OSTI ID:
- 4006089
- Journal Information:
- Zhur. Anal. Khim., Journal Name: Zhur. Anal. Khim. Vol. Vol: 16
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
Similar Records
SPECTROGRAPHIC DETERMINATION OF IMPURITIES IN Mo AND ITS COMPOUNDS BY VAPORIZATION METHOD
Baseline concentrations of 15 trace elements in Florida surface soils
Related Subjects
ANTIMONY
BARIUM
BERYLLIUM OXIDES
CADMIUM
CALCIUM
CHEMISTRY
CHROMIUM
COBALT
COPPER
ENRICHMENT
IMPURITIES
INSTRUMENTS
IRON
LEAD
MAGNESIUM
MANGANESE
MEASURED VALUES
MOLYBDENUM
NICKEL
NITRIC ACID
OXALATES
PHOTOGRAPHY
QUANTITATIVE ANALYSIS
QUARTZ
SENSITIVITY
SILVER
SOLUTIONS
SPECTRA
THORIUM
THORIUM COMPOUNDS
TIN
TITANIUM
VANADIUM
ZINC