Bismuth-207 Analyses
The solvent extraction techniques of Sill and Willis
were used for separating and purifying 207 54.
(1965)
Bismuth-212 was
used as a yield determinant.
Plutonium-238,
239 Analyses
Plutonium-238,239 was separated by a combination of solvent
extraction and anion exchange techniques
1960; Kressin and Waterbury,
1962), with electrodeposition as
the final step in the separation.
determine yield.
(McCowan and Larsen,
Plutonium-236* was used to
A quantitative separation of plutonium from
the coraline soils and sediments is exceptionally difficult and
it is therefore essential that
236
Pu be used as a yield determi-
nant and that counting be done by alpha spectrometry.
Tritium Analyses
r
Well water samples were measured for tritium content by a
liquid scintillation technique with a minimum level of detection
of 200 tritium units.
RESULTS AND DISCUSSION
The predominant radionuclides in the terrestrial organisms
3
are 1 Tos and
90
:
.
.
Sr, whereas the marine organisms contain mainly
* Provided by the USAEC Health and Safety Laboratory, New York.