MULTIPLE ADDRESSEES B. ELEVEN PLACE SAMPLE IN MUFFLE FURNACE AND HEAT @ 700°C FOR Z HOURS. REMOVE FROM MUFFLE FURtiACE AND ALLOW TO COOL. c. TRANSFER SA;4PLE TO 250 ML BEAKER USING 3YHN03. USING H}403 A;4D H202. D. E. AVOID EXCESSIVE HEAT. DISSOLVE SAMPLE !AIITH20 ML 0.08~HCl. TO BREAKUP PLACE IN SO1/OGEN LA,RGE PARTICLES. TRANSFER THE SAHPLE INTO A 125 ML SEPARATOR RINSE THE BEAKER WITH 20ML FUNNEL. ASH 0.08~HCl FUNNEL. A\/D ADD TO SEPARATOR (IF LARGE AMOUNT OF INSOLUBLE MATERIAL REMAINS CENTRIFUGE TO REMOVE II{SOLUBLE MATERIAL AilD TRANSFER SUPERt{ATE INTO SEPARATOR F. FUNNEL.) ADD 401YlL OF 5% HDEHP, SHAKE FOR 2 MINUTES. TO SEPARATE. ALLOW PHASES RECORD THE DATE AND TI:4E OF EXTRACTION (T2 ) AFTE!? DRAINII{G THE BOTTOM LAYER INTO ANOTHER 125 ML SEPARATOR FUNNEL AND REPEAT THE EXTRACTION WITH 5% HDEHP. (STORE AQUEOUS PHASE IN BOTTLE FOR Y-90 lNGROJ!TH AND REANALYSIS IF REQUIRED. ) -. G. STRIP THE YTTRIUM FRON THE 5% HDEHP LAYERS WITH 40ML OF 31 HN03. SHAKE FOR TWO MINUTES AND ALLOW PHASES TO SEPARATE FOR FIVE MINUTES. 50ML DRAIN BOTTOM LAYER INTO CENTRIFUGE TUBE, ADD NH40H DROPWISE TO PH 9 WITH CONSTANT STIRRI!!G, CENTRIFUGE DISCARD SUPERNATE AND COMBINE YTTRIUM HYDROXIDE PRECIPITATION WITH 111HC1. BY DISSOLVING