42 Rompe retepee eee RE The 8 M HCL-actinide solution is washed into a 250-ml separatory funnel with 8 M HCL and 10 drops of 30% Ho0o are added. 25 ml of 10% purified TIOA-Xylene solution is added to the funnel and sheten for greater than 10 seconds. Drain and discard the lower aqueous phase. 10. Wash the organic phase with a 25-ml addition of 8 M HCL by shaking for an additional 10 seconds. Drain and discard the lower aqueous phase. en Ne omep e one VW. Plutonium is back extracted into 25 ml of 8 MHCL - .05 M NHgl solution at 50-80 C by shaking for 1 minute and draining and saving the lower aqueous phase. 12. Neptunium is back extracted into 25 ml of 4 N HCL-.02 N HF with shaking for one minute. Tp yee WORE ner ok 13. Uranium is back extracted into 25 ml of an 0.1 M HCL solution with one minute of shaking. The back extraction steps are repeated a second time in each case; the two extractions are combined, evaporated to dryness, and wet-ashed. ELECTRODEPOSITION 14, One ml of conc. HaS0,4 is added to the residue, which is: then heated until white vapors appear. 20 ml of distilled water is added. The beaker fs cooled and about One or two drops of a 5% Thymol Blue indicator solution (in ethanol) is added with swirling. The red color is made yellow by the addition of conc. NHqQH and the color is then further adjusted with dilute reagents until the salmon-pink to straw-colored end point is reached (pH 2.0-2.3). 15. After transferring the solution to a plating cell with a distilled water rinse, the actinides are plated onto platinum discs, using ron AOR ae age a rotating platinum electrode for the anode. Distilled water is added occasionally to maintain the total volume of the plating solution.