Simultaneous analysis of uranium and nitrate
A direct spectrophotometric method has been developed for the determination of 20 to 200 g/l of uranium in the presence of 3 to 5 M nitric acid. A dual-wavelength analysis is used to eliminate the enhancing effect of nitrate ion on the uranium visible spectra. The precision and accuracy of the simultaneous analysis of uranium and nitrate were compared using combinations of the four uranium wavelength maxima, occurring at 426, 416, 403 and 359 nm. Calculations based on 426 and 416 nm data yielded the most accurate results. The calculated relative standard deviation of uranium and nitrate concentrations was 5.4 percent and 15.5 percent, respectively. The photometric procedure is slightly affected by temperature; an increase of one degree centigrade results in a 0.2 g/l overestimation of uranium concentration. Because the method is non-destructive, it is directly applicable to the continuous in-line analysis of dissolved uranium in aqueous fuel reprocessing streams.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5080075
- Report Number(s):
- ORNL/TM-6292
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental parameters in the photometric analysis of uranium in TBP-dodecane solutions
Molar Absorptivities of U(VI), U(IV), and Pu(III) in Nitric Acid Solutions of Various Concentrations Relevant to Developing Nuclear Fuel Recycling Flowsheets
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FUEL REPROCESSING PLANTS
ON-LINE MEASUREMENT SYSTEMS
NITRATES
SPECTROPHOTOMETRY
URANIUM
ACCURACY
NITRIC ACID
NONDESTRUCTIVE ANALYSIS
PROCESS CONTROL
QUANTITATIVE CHEMICAL ANALYSIS
SENSITIVITY
TEMPERATURE EFFECTS
ACTINIDES
CHEMICAL ANALYSIS
CONTROL
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
NITROGEN COMPOUNDS
NUCLEAR FACILITIES
ON-LINE SYSTEMS
OXYGEN COMPOUNDS
050800* - Nuclear Fuels- Spent Fuels Reprocessing
400104 - Spectral Procedures- (-1987)