aceceatcsl
Bismuth-207 Analyses
The solvent extraction techniques of Sill and Willis (1965)
were used for separating and purifying 20754.
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
Well water samples were measured for tritium content by a
liguid scintillation technique with a minimum level of detection
of 200 tritium units.
“
RESULTS AND DISCUSSION
The predominant radionuclides in the terrestrial organisms
137 Cs
and
90 Sr,
;
,
a
,
whereas the marine organisms contain mainly
* Provided by the USAEC Health and Safety Laboratory, New York.
Pia
Pigg
(PEL,
ee een ee
are