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SPECTROPHOTOMETRIC DETERMINATION OF ZIRCONIUM AND HAFNIUM WITH OXINE AND THE APPLICATION TO THE ANALYSIS OF URANIUM (in Japanese)

Journal Article · · Bunseki Kagaku (Japan)
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A fundamental study was made of the spectrophotometric method for the determination of microgram quantities of zirconium and hafnium using oxine. The determination is based on the extraction of their oxinates with chloroform and the spectrophotometric measurement of the extracts. There is not much difference between zirconium and hafnium in the optimum pH range for the extraction (pH 4.5 to 11.3), the wave length of maximum absorption (385 m mu ), molar absorbance index (1.4 x 10/sup 4/), and in the effects of several other substances. The method can be used for the determination of 3 to 60 mu g of zirconium and 6 to 120 mu g of hafnium. The established method was also applied to the separation and determination of zirconium in uranium. Extraction of uranium and aluminum is prevented by the use of acetate and a definite amount of fluoride ion (15 mg of fluoride ion for each 1 gram of uranium), respectively. In this condition, optimum pH range for zirconium extraction is 4.8 to 5.3. The extract is washed with a carbonatecyanide washing solution to remove copper and nickel. By measuring the absorbances of the extract at 385 and 470 m mu , zirconium and iron can be determined simultaneously. (auth)

Research Organization:
Japan Atomic Energy Research Inst., Tokyo
Sponsoring Organization:
USDOE
NSA Number:
NSA-18-001545
OSTI ID:
4147692
Journal Information:
Bunseki Kagaku (Japan), Journal Name: Bunseki Kagaku (Japan) Vol. Vol: 11; ISSN BNSKA
Country of Publication:
Country unknown/Code not available
Language:
Japanese

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Related Subjects

ABSORPTION
ACIDITY
ALUMINUM OXIDES
ALUMINUM SILICATES
BERYL
BERYLLIUM OXIDES
BERYLLIUM SILICATES
CALCIUM OXIDES
CERAMICS
CHEMISTRY
CHLOROFORM
CHROMIUM OXIDES
EXPANSION
FREQUENCY
HAFNIUM
HAFNIUM COMPLEXES
HETEROCYCLICS
HYDROXIDES
LITHIUM OXIDES
MAGNESIUM OXIDES
MATERIALS TESTING
MINERALS
NICKEL OXIDES
ORGANIC CHLORINE COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHASE DIAGRAMS
PHOTOMETRY
QUANTITATIVE ANALYSIS
QUINOLINE
RARE EARTHS
REFRACTORIES
SILICON OXIDES
SOLVENT EXTRACTION
SPECTROSCOPY
STRONTIUM OXIDES
THERMAL SHOCK
THERMAL STRESSES
THORIUM OXIDES
THORIUM PHOSPHATES
TIN OXIDES
TITANIUM OXIDES
TRACE AMOUNTS
URANIUM
W