Study of the isotope effect in the isotope exchange reaction between PuIV and PuIII by extraction redox-chromatography

The equilibrium isotope effect in the isotope exchange reaction between Pu^IV extracted with tributyl phosphate and Pu^III in an aqueous nitric acid solution has been studied by extraction chromatography. For the 238/242Pu isotope pair the isotope separation coefficient () at 25 °C has been found to be 1.0022±0.0005.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1557–1558, September, 1994.The authors are grateful to Prof. N. N. Krot for discussion of the results and valuable remarks and to V. P. Perminov for help in designing the computer programs.This work was financially supported by the International Science Foundation (Grant MDB 000).