Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange
The enrichment of calcium isotopes has been observed in ion-exchange chromatography with an aqueous phase of calcium hydroxide and a solid phase of sulfonic acid resin. The band front was exceedingly sharp as a result of the acid-base reaction occuring at the front of the band. Single-stage separation coefficients were found to be epsilon(/sup 44/Ca//sup 40/Ca) = 11 x 10 /sup -4/ and epsilon(/sup 48/Ca//sup 40/Ca) = 18 x 10/sup -4/. The maximum column separation factors achieved were 1.05 for calcium-44 and 1.09 for calcium-48 with the heavy isotopes enriching in the fluid phase. The calcium isotope effect between fully hydrated aqueous calcium ions and undissociated aqueous calcium hydroxide was estimated. For the calcium-44/40 isotope pair the separation coefficient was 13 x 10/sup -4/. 20 references, 2 figures.
- Research Organization:
- Monsanto Research Corp., Miamisburg, OH
- DOE Contract Number:
- AC04-76DP00053
- OSTI ID:
- 6418050
- Journal Information:
- Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 19:2-3; ISSN SSTED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
400203 -- Isotope Exchange & Isotope Separation-- (-1987)
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM 44
CALCIUM 48
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM ISOTOPES
DATA
DISPERSIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
INTERMEDIATE MASS NUCLEI
ION EXCHANGE
ISOTOPE EFFECTS
ISOTOPE RATIO
ISOTOPE SEPARATION
ISOTOPES
MIXTURES
NUCLEI
NUMERICAL DATA
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
STABLE ISOTOPES