add 400 ml of 8N HNO 5 to the resin and stir for at least 30 minutes,
filter the acid through a Whatman #42 paper and wash the resin with
three 50 ml volumes of 8N HNO
evaporate the acid solution to dryness, add 50 ml of 304% 4,0, and evanorate to dryness,
cood and dissolve in 50 ml of 1:1 HCl;
if any insoluble material re-
mains at this pointe filter through a double glass fiber filter paper,
transfer to a 150 ml beaker and evaporate to dryness,
LO.
dissolve in 60 ml of 0.08N HCl and proceed to step #1 of the HDEHP
procedure.
The following procedure is for the preparation of teeth samples for
radiochemical analysis:
l.
due to the small sample size and the fact that in most cases strontium
oo ¥
and plutonium results are requested add both 2425, and 85 5- tracers, 40
mg strontium carrier and 40 mg yttrium carrier to the sample,
dissolve sample in 1:1 HNO, and wet ash to yield a clean white residue,
dissolve residue in dilute HNO, and proceed to plutonium alxaline earth
phosphate method, strontium analysis is performed by the HDEHP method
on the column effluent.