Table 1.
.
Analytical program for Bikini samples.
Sample type
Total collected
Gamma counting
Wet chemistry
Bikini soil
648
369
333
Eneu soil
167
118
118
Bikini vegetation
96
96
96
Eneu vegetation
31
31
31
Bikini animal
10
LO
10
.
the samples analyzed by gamma
gamma spectrometry.
spectrometry.
from each large soil sample were sub-
All radionuclide
Separate aliquots .
concentrations, whether determined
mitted for wet chemistry and for gamma
by gamma spectrometry or wet chemis-
spectroscopy.
try, were reported to a reference
quired for certain nuclides that could
time of 1 Jan 1975
not be measured by gamma counting;
(001.000 Z,
75).
All initial processing was
the majority of these nuclides were
conducted at LLL and consisted
either alpha or beta emitters.
primarily of drying, homogenizing,
and packaging the samples.
Wet chemistry was re-
Discussions of the individual
Soil
quality control programs are included
and vegetation samples were dried
in the sections dealing with gamma
by heating in ordinary ovens.
spectrometry and wet chemistry.
Ten
samples of pig and chicken tissue
Reproducibility of measurements was
collected on Bikini were lyophilized.
examined by statistically comparing
Wet-chemistry analyses performed
ratios of the individual measurements
by MCL involved the dissolution of
of a given isotope.
a sample aliquot,
and standard deviation of
chemical separation
The mean value
the ratios
of the desired elements, and radiation
were then calculated.
measurement of the elemental samples.
of a mean value differing from unity,
In no case was an entire sample
i.e.,
consumed in a single dissolution.
was tested by calculating the standard
All vegetation and animal tissue
error,
samples submitted for wet chemistry
mean} multiplying Sy by a factor t,
had been analyzed previously by
which is based upon the 95 percent
~2-
The significance
indication of possible bias,
Ss» of the mean }!
(logarithmic