SPECTROPHOTOMETRIC DETERMINATION OF NIOBIUM WITH XYLENOL ORANGE ANALYSIS OF URANIUM-BASE ALLOYS (in Japanese)
A method is described for the spectrophotometric determination of niobium with Xylenol Orange. The sample solution containing 5 approximates 60 mu g of niobium is transferred to a 25 ml volumetric flask. Sulfuric acid concentration is adjusted to make the acidity 0.05 approximates 0.25N after diluting to volume. Ascorbic acid is then added to reduce iron(III). Sodium sulfate is added to mask small amounts of thorium. Xylenol Orange is added, followed by aluminum sulfate. The aluminum is added to eliminate the interference of fluoride that is presnet in the sample solution. After diluting to the mark and allowing to stand for 1 hr, the absorbance is measured in a 1 cm cell at 53 m mu , using the reagent blank as the reference. Beer's law is obeyed, and the molar absorptivity is 2.3 x 10/sup 4/. According to the continuous variation and slope ratio methods, the composition of the colored products corresponds to a mixture of NbXO and Nb(XO)/sub 2/, where XO is Xylenol Orange. The proposed method was applied to uranium-base alloys, and favorable results were obtained. (auth)
- Research Organization:
- Japan Atomic Energy Research Inst., Tokyo
- NSA Number:
- NSA-18-001543
- OSTI ID:
- 4161097
- 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
ACIDITY
ALUMINUM SULFATES
BERYLLIUM OXIDES
CHEMISTRY
DECOMPOSITION
FLUORIDES
HIGH TEMPERATURE
INTERFERING ELEMENTS
IRON COMPOUNDS
MASKING AGENTS
MEASURED VALUES
NIOBIUM
NIOBIUM COMPLEXES
PHOTOMETRY
PRESSURE
QUANTITATIVE ANALYSIS
REDUCTION
REFRACTORIES
SODIUM SULFATES
SOLUTIONS
SPECTROSCOPY
STABILITY
SULFURIC ACID
TEMPERATURE
THORIUM
URANIUM ALLOYS
VAPORS
VITAMIN C
VITAMINS
VOLATILITY
WATER
XYLENOL ORANGE