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Abhängigkeit der Chlor-Isotopenseparation vom Vernetzungsgrad eines stark basischen Anionenaustauschers / Dependence of Chlorine Isotope Separation on the Degree of Cross Linkage of a Strongly Basic Anion Exchange Resin

Author:
Heumann, Klaus G., Roßmann, Paul, Schwarz, Anni, Windfelder, Alfred
Source:
Zeitschrift für Naturforschung 2014 v.34 no.3 pp. 406-411
ISSN:
0932-0776
Subject:
anion exchange resins, cations, chlorides, chlorine, crosslinking, ion exchange chromatography, mass spectrometry, sodium nitrate, stable isotopes
Abstract:
Using ion exchange chromatography, the dependence of the chlorine isotope separation on the degree of cross linkage of a strongly basic anion exchange resin was investigated. With increasing degree of cross linkage the elementary separation effect for the two stable isotopes ³⁵Cl and ³⁷Cl increases. In all experiments ³⁵Cl- is enriched in the resin phase, whereas ³⁷Cl- is enriched in the solution, using 0.1 M NaNO₃ as an eluant. Within the degree of cross linkage of 2 to 10 per cent investigated, there is a linear correlation of the elementary separation effect of the chlorine isotopes with the selectivity coefficient between the ions NO₃- and Cl-. The results show that the electrolyte behavior of anionic isotope exchange reactions is comparable with that of cations. The ³⁵Cl/³⁷Cl isotope ratio is determined using thermal ionization mass spectrometry.
Agid:
5215850