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), Vol. 19:2-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM 44
ISOTOPE EFFECTS
ISOTOPE SEPARATION
CALCIUM 48
AQUEOUS SOLUTIONS
CALCIUM HYDROXIDES
EXPERIMENTAL DATA
ION EXCHANGE
ISOTOPE RATIO
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM ISOTOPES
DATA
DISPERSIONS
EVEN-EVEN NUCLEI
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MIXTURES
NUCLEI
NUMERICAL DATA
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
STABLE ISOTOPES
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation
400203 - Isotope Exchange & Isotope Separation- (-1987)