Calcium isotope separation by chemical exchange with polymer-bound crown compounds

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6081331

Jepson, B E

Chromatographic separation of calcium isotopes by chemical exchange with polymer-bound 18-crown-6 was investigated. The breakthrough technique of column chromatography was employed to determine the influence of solvent composition and ligand-tether structure on separation coefficients and heterogeneous calcium complex stability. The separation coefficient, {epsilon}, was found to be strongly dependent upon solvent composition. An {epsilon} of 0. 0025{plus minus}0.0002 (95% C.L.) for the {sup 44}Ca/{sup 40}Ca isotope pair was obtained with a 70/30 (by volume) methanol/chloroform solvent mixture at 20.0{degree}C. Differences in the structure of the tether binding the crown ring to the polymer had no influence on {epsilon} at that solvent composition. 8 refs., 5 figs., 1 tab.

• Research Organization: EG and G Mound Applied Technologies, Miamisburg, OH (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-88DP43495
• OSTI ID: 6081331
• Report Number(s): MLM-3675(OP); CONF-9010294-1; ON: DE91006444
• Resource Relation: Conference: International symposium on isotope separation and chemical exchange uranium enrichment, Tokyo (Japan), 29-31 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM ISOTOPES
ISOTOPE SEPARATION
CALCIUM 40
CALCIUM 44
CHELATES
LIQUID COLUMN CHROMATOGRAPHY
POLYETHYLENE GLYCOLS
SEPARATION PROCESSES
STABILITY
ALCOHOLS
ALKALINE EARTH ISOTOPES
CHROMATOGRAPHY
COMPLEXES
EVEN-EVEN NUCLEI
GLYCOLS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
STABLE ISOTOPES
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation