Spectrophotometric Determination of Uranium with 1-(2-Pyridylazo)-2-naphthol
From 40 to 400 gamma of uranium can be determined by extraction of uranyl nitrate into a tributyl phosphatechloroform solvent and subsequent color development in the organic extract with 1-(2-pyridylazo)-2-naphthol (PAN) in the presence of pyridine. The disodium salt of (ethylenedinitrilo)tetraacetic acid increased the selectivity of uranium extraction by chelating zirconium, bismuth, and manganese(II). Thorium is removed as thorium oxalate prior to extraction. Synthetic solutions containing uranium and 37 diverse ions were analyzed by the PAN and fluorometric procedures. The PAN procedure gave an average uranium recovery of 99% and an average deviation of plus or minus 2%. The fluorometric procedure gave an average recovery of 98% and an average deviation of plus or minus 4%. Analyses of alloys, ores, and organic extracts by the PAN and fluorometric methods are reported.
- Research Organization:
- Dow Chemical Co., Midland, Mich.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-001154
- OSTI ID:
- 4286244
- Journal Information:
- Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 11 Vol. 30; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ABSORPTION
ALLOYS
BISMUTH
BISMUTH COMPLEXES
BUTYL PHOSPHATES
CHELATES
CHEMICALS
CHLORINATED HYDROCARBONS
CHLOROFORM
COLOR
COMPOUNDS
EDTA
ERRORS
FLUORESCENCE
FLUOROMETRY
INTERFERING ELEMENTS
LIGHT
MANGANESE COMPLEXES
MANGANESE COMPOUNDS
MEASURED VALUES
MIXING
NAPHTHALENE
ORES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXALATES
PAN
PERFORMANCE
PHENOLS
PHOTOMETRY
PRECIPITATION
PYRIDINES
QUALITATIVE ANALYSIS
RECOVERY
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
SOLVENT EXTRACTION
SPECTROSCOPY
STANDARDS
TABLES
THORIUM COMPOUNDS
TRACE AMOUNTS
URANIUM
URANIUM COMPLEXES
URANYL NITRATES
ZIR
ZIRCONIUM