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I ‘.Poi-iii&;v&
“r .
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9
ANALYTICAL
MET11ODS
Gamma –l<ay Spectronetr~
——
—
—.
Al]. of the
They were
NaI(Tl)
analyzed
countccl for at least
crystal
Selected
were
samples
used
samples
counted
3 x 3-inch
detector
5 x 5-inch
crys-iial~ operating
Most
in polyvinyl
in a density
of 1.0.
for example,
were
sealed
in PVC pipe.
a density
of 1.35
Spectrum
of least
were
error
given
Strontium-90
concentration
with
stable
opposing
dried,
ground
to. a volume
resulting
hepatopancreas
lobster
acid,
in hydrochloric
samples
and
were
and
compressed
to
was done
by
Schonfeld’s
A set of previously
geometries
individual
prepared
and radionuclides
for decay
to the date
values
(1965)
method
reference
was
used.
spectra
All
of collection.
The
is the 95% error.
Analy~es
Strontium–90
solvent
two
a
in PVC pipe.
corrected
for
(PVC) pipe
soil
with
spectrometer.
oven
spiny
analyzer.
either
consktingof
were
samples,
Oven–dried
squares.
values
samples
-
a 3 x 3–inch
minutes,
as a summing
dissolved
resolution
for the different
by
ashed,
with
sp@ctrometry
a 256-channel
system
chloride
Small
with
for 1,000
or a detector
of the biological
compressed
100 minutes
in conjunction
were
by gamma-ray
was
of its
extraction
yttrium
determined
90
by measuring
Y daughter.
Yttrium-90
and precipitation
serving
as both
the
was
equilibrium
separated
techniques
(Petrow,1965),
.-
a carrie”r and a yield
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