Extraction of Tc(VII) and Re(VII) on TRU resin

Abstract TRU resin can be used to rapidly and selectively extract Tc(VII) and Re(VII). The retention capacity curves of Tc(VII) and Re(VII) for HNO 3 , HCl, H 2 SO 4 and H 3 PO 4 solutions were studied and prepared. Tc(VII) and Re(VII) were simultaneously extracted in 2 M H 2 SO 4 and 1.5 M H 3 PO 4 and were effectively separated from Mo(VI) and Ru(III). Tc(VII) and Re(VII) remained strongly bonded to the resin even after washing using a large volume of 2 M H 2 SO 4 at a relatively high flow rate. Also, they were both completely eluted from the resin using 15 mL of near boiling water, an eluent directly compatible for ICP-MS instrument measurements.