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

Conference · Mon Jan 01 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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