Colorimetric determination of ferrous-ferric ratio in glass
This memorandum describes a simple, rapid colorimetric procedure that can be used for analysis of vitrified melter feed. This method can replace the Moessbauer spectroscopy method for routine DWPF process control analysis. A colorimetric method has been developed that is recommended as a replacement for Moessbauer spectroscopy for process control measurements of the Fe(II)/Fe(III) ratio of melter feed for the DWPF analytical laboratory. The results agree satisfactorily with Moessbauer values. The method is suitable for remote operation and has several advantages. The total time involved is less than 30 minutes. Quantitative measurements of samples, reagents, and dilutions are unnecessary because only the ratio value is required and both Fe(II) and total Fe are measured on the same solution. Small samples (<3 mg total Fe) are required, minimizing radiation exposure, because of the high sensitivity of the colorimetric method. Relative precision and relative accuracy are about {plus minus}5%.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 7080410
- Report Number(s):
- DPST-87-304; ON: DE90009301
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
IRON
MEASURING METHODS
RADIATION EFFECTS
COLORIMETRIC DOSEMETERS
DISSOLUTION
GLASS
MOESSBAUER SPECTROMETERS
PRECIPITATION
PROCESS CONTROL
VALENCE
CONTROL
DOSEMETERS
ELEMENTS
GAMMA SPECTROMETERS
MEASURING INSTRUMENTS
METALS
SEPARATION PROCESSES
SPECTROMETERS
TRANSITION ELEMENTS
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400102 - Chemical & Spectral Procedures