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DAMP
-36on of the Chemical Analyses of the
Biological Samples
Pission product and calcium analyses were made of three soil
ples
strontium analyses of selected foods, and qi31 analyses
dante.
oad
‘Dr
,
Additional samples collected December 8 were sent
ine,
. Walter Claus, Division of Biology and Medic
for
.
cal analyses.
Samples were taken from the top inch of soil on March 26,
3 , from both Labaredj and Kabelle.
solved in dilute nitric acid.
Portions were ashed and then
There was only a very small
Z ount of insoluble residue containing less than O.1 percent of
e radioactivity of the solute.
Aliquots of this solution were
ed to determine total activity and to provide samples for
femical separation.
Standard methods of separating fission products and calcium
ye followed.
Counts obtained from the analyses for cerium,
econium, niobium, strontium, ruthenium, and barium were cor-
eted for chemical or spike yield.
The chemical yield is the
bio of the weight of recovered carrier to added carrier.
A
pid for calcium was not determined because of the large amount
B Oalcium carbonate in the sample.
The radioactivity of seven
@sion products and calcium corrected for yield and adjusted
| loo percent recovery and expressed as a
percentage of the
1 radioactivity 1s given in Table VI.
The chemical yields
. the observed counts from which these values were computed
tabulated in Appendix Table XI.
The results of radiostrontium analyses of
biological samples
om Rongelap Atoll are given in Table VII.
Radiostrontium was ,