I0GTRONTIUM DETERMINATION 3Y HDEHP {DI-(2-ZTHYLHEXYL) P4YCSPYORIC ACID) METHOD
Reagencs
dydrochloric Acid
HDERP
HDEHP
Nitric Acid
0.08N
20% un Toluene by weight
7% in Toluene Sy weigne
3N
Ammonium Hydroxide
Oxalic Acid
58%
Saturated Solution
Yttrium Carrier (Purified)
20 mg/ml
If preliminary results are desired, steps 5 through 9 can be carried out on
the two 60 ml aliquots of 10% HDEHP.
The procedure is as follows:
l.
transfer 60 ml of 0.08N HCL sample solution into a 125 mi separatory
funnel, add 20 mg yttrium carrier,
2.
rinse sample container with 60 mi of 20% HDEHP and add to separator?
€unnel,
3.
extract the sample by shaking vigorously for 2 minutes, allowing phases
to separate, then drain off the lower aqueous phase into a second 125
ml separatory funnel containing 60 ml of 20% HDEXP,
4.
extract the sample again by shaking for 2 minutes, allowing phases to
separate and recording the time of second extraction,
5.
drain off the lower aqueous shase into a 100 ml polyethylene dotcle,
add 1 ml of yttrium carrier, gamma count for S 3st rontium recovery and
store 18 days for Ove erium ingroywth,
6.
transfer sample to 125 ml separatory funnel and extract with 60 ml of .
5% HDEHP.
Note the cime of extraction.
Save the aqueous phase for fu-
ture extractions if necessary,
7.
wash the organic phase by shaking with 60 al cf 0.08N HCl,
10