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Title: Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Monsanto Research Corp., Miamisburg, OH
OSTI Identifier:
6418050
DOE Contract Number:  
AC04-76DP00053
Resource Type:
Journal Article
Journal Name:
Sep. Sci. Technol.; (United States)
Additional Journal Information:
Journal Volume: 19:2-3
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, 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)

Citation Formats

Jepson, B E, and Shockey, G C. Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange. United States: N. p., 1984. Web. doi:10.1080/01496398408060653.
Jepson, B E, & Shockey, G C. Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange. United States. doi:10.1080/01496398408060653.
Jepson, B E, and Shockey, G C. Sun . "Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange". United States. doi:10.1080/01496398408060653.
@article{osti_6418050,
title = {Calcium hydroxide isotope effect in calcium isotope enrichment by ion exchange},
author = {Jepson, B E and Shockey, G C},
abstractNote = {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.},
doi = {10.1080/01496398408060653},
journal = {Sep. Sci. Technol.; (United States)},
number = ,
volume = 19:2-3,
place = {United States},
year = {1984},
month = {1}
}