Using radioisotope markers the distribution coefficients (K d ) of the following elements In, Sn, Sb, Te, Bi, Co, Fe, Nb, Sr, Ba, Ag, Cd, Zr, Hf and Ti were determined with different concentrations of HCl, H 2 SO 4 and HNO 3 for the extraction chromatographic resin Uranium and TEtraValent Actinides (UTEVA). This data can be used for separation of elements in complex mixtures, as well as for correct assessment of the elements chemistry with higher valences such as 3, 4, 5 or 6.

No abstract

No abstract

The distribution of some rare-earth elements (REE) on UTEVA resin was determined from different concentrations of inorganic (HCl, HNO 3 , HClO 4 , HPF 6) and one organic acid-CCl 3 COOH. Low sorption of all REE in the range of 1M-5M HNO 3 was observed. In more concentrated HNO 3 , a rapid increase of the distribution coefficients (K d) was noticed with an increase in the atomic number of the lanthanides as well as in Y and Sc. The system UTEVA-CCl 3 COOH showed a higher selectivity for Eu(III). Chromatographic elution profiles were checked in order to confirm the obtained K d values. All solutions containing the chosen radionuclides were evaporated to dryness under an IR lamp.