Boron Isotope Separation by Ion Exchange Chromatography Using Weakly Basic Anion Exchange Resin

1980 ◽  
Vol 53 (7) ◽  
pp. 1860-1863 ◽  
Author(s):  
Yoichi Sakuma ◽  
Masao Aida ◽  
Makoto Okamoto ◽  
Hidetake Kakihana
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Isotope Separation ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Boron Isotope ◽  
Basic Anion Exchange Resin ◽  
Basic Anion

Boron isotope separation by ion-exchange chromatography using an anion-exchange resin in halide forms

1988 ◽  
Vol 450 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Takao Oi ◽  
Tetsuro Tsukamoto ◽  
Hideki Akai ◽  
Hidetake Kakihana ◽  
Morikazu Hosoe
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Isotope Separation ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Boron Isotope

scholarly journals Chlor-Isotopenseparation an einem wasserhaltigen Zirkondioxidaustauscher / Chlorine Isotope Separation Using an Hydrous Zirconium Dioxide Exchanger

1980 ◽  
Vol 35 (5) ◽  
pp. 642-647 ◽  
Author(s):  
Klaus G. Heumann ◽  
Klaus Baier ◽  
Gerald Wibmer
Keyword(s):  
Anion Exchange ◽  
Zirconium Dioxide ◽  
Isotope Fractionation ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Isotope Separation ◽  
Chlorine Isotope ◽  
Basic Anion Exchange Resin ◽  
Basic Anion ◽  
Hydrous Zirconium

AbstractHydrous zirconium dioxide is used in column experiments for separating the halide ions as well as for isotope fractionation of chlorine. The preparation of the zirconium dioxide particles is carried out by homogeneous hydrolysis of a zirconyl chloride solution using hexamethylenetetramine. The separation order of the halides is I-, Br- and Cl- in contrast to the inverse separation order using a strongly basic anion exchange resin. In chlorine isotope separation experiments an enrichment of 35Cl- is found in the first fractions, whereas the last fractions show a significant enrichment of 37C1-. This also indicates an inversion of the isotope separation compared with a strongly basic anion exchange resin. A dependence of the isotope fractionation on the concentration of the NaNO3 solution used as eluant is found. With increasing concentration the isotope fractionation decreases. Using a 0.5 M NaNO3 solution the elementary separation effect was calculated e = 6,1 · 10-4 . This is one of the highest isotope fractionations known in a chloride isotope exchange system. The results show that the electrolyte behaviour of isotopes is comparable to that of a series of homologous elements.

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

1979 ◽  
Vol 34 (3) ◽  
pp. 406-411 ◽  
Author(s):  
Klaus G. Heumann ◽  
Paul Roßmann ◽  
Anni Schwarz ◽  
Alfred Windfelder
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Isotope Separation ◽  
Exchange Reactions ◽  
Separation Effect ◽  
Chlorine Isotope ◽  
Cross Linkage ◽  
Basic Anion Exchange Resin ◽  
Basic Anion

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.

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