Radiochemical investigation of 90Y separation from 90Sr and 90Y mixture with D2EHPA-St-DVB extractant polymer resin

In this paper, authors described a synthesizing method D2EHPA (bis (2-ethylhexyl) phosphoric acid)-St (styrene)-DVB (divinyl benzene) extractant polymer resin and determination of extraction equilibrium constants and adsorption band movement rate of metal ions on extractant polymer resin. Authors also reported a radiochemical separating method of Y-90 from Sr-90 with D2EHPA-St-DVB extractant polymer resin. D2EHPA-St-DVB extractant polymer resin was synthesized from styrene, divinyl benzene and D2EHPA by adding benzene as solvent and dibenzoyl peroxide as initiator at 80 degrees C and 90 degrees C for 5 h and 1 h, respectively. Starch solution was added as emulsion stabilizer. Adsorption band movement rate of Sr and Y ions on chromatography column charged with synthesized extractant polymer resin and extraction equilibrium constants were determined under the certain experimental conditions. Nuclide purity of separated Y-90 was fit for requirement of radiopharmaceuticals and loss of Y-90 on separating process was less than 1.5%.