SPECIFICATIONS FOR TOTAL
BETA ACTIVITY MEASURENENTS
Determination of mixed fission products (total teta activity
in samples of soil, water, vegetation and bons} = the following requirements are suggested:
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Analyses to be made on dried aliquots of soluticns
prepared fremthe above samples by ashing or other
suitable treatment. The weight of sample in the
aliquot may: te selected by the analyst to give
suitabls activity.
#-
The originall sample dissolved should be a minimm
of 10 grams of ash or other solid, or the complete
sample.
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<A correction should be mde for self-absorption by
standard techniques but a self-abserption curve on
each sample is not required.
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The beta activity should be determined by standardization against the K-40 in natural potassium salts,
the standard also being corrected for self-absorption. -
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9002341
Wo chemical separations are required and any natural
activity may be included as part of the tetal beta
activity.