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