Abhängigkeit der Chlor-Isotopenseparation vom Vernetzungsgrad eines stark basischen Anionenaustauschers

K l a u s G . H e u m a n n , P a u l R o ß m a n n , A n n i S c h w a r z u n d A l f r e d W i n d f e l d e r Inst i tut f ü r Chemie der Univers i tä t R e g e n s b u r g Z . N a t u r f o r s c h . 34b, 4 0 6 4 1 1 (1979) ; e ingegangen a m 4. D e z e m b e r 1978 I s o t o p e Separat ion , Chlorine, I o n E x c h a n g e C h r o m a t o g r a p h y , Mass S p e c t r o m e t r y U s i n g ion e x c h a n g e c h r o m a t o g r a p h y , the d e p e n d e n c e o f the chlorine i so tope separat ion o n the degree o f cross l inkage o f a s t rong ly basic anion exchange resin was invest igated . W i t h increasing degree o f cross l inkage the e l ementary separation e f fect f o r the t w o stable i so topes 35C1 a n d 37C1 increases. I n all exper iments 35C1~ is enr iched in the resin phase , whereas 37C1~ is enr i ched in the so lut ion , using 0.1 M NaNC>3 as an e luant . W i t h i n the degree o f cross l inkage o f 2 t o 10 per cent invest igated , there is a linear correlat ion o f the e l ementary separat ion e f fect o f the chlor ine i sotopes wi th the select iv ity coe f f i c ient b e t w e e n the ions NO3"" a n d C l . T h e results s h o w that the e lectro lyte behav io r o f anionic i s o tope e x c h a n g e react ions is c o m p a r a b l e w i t h that o f cat ions. T h e 35C1/37C1 i so tope rat io is d e t e r m i n e d using thermal ionizat ion mass s p e c t r o m e t r y .