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 ⁹⁰Y from ⁹⁰Sr 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 °C and 90 °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 ⁹⁰Y was fit for requirement of radiopharmaceuticals and loss of ⁹⁰Y on separating process was less than 1.5%. (author)