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MR. EISENBUD:
That ie very good.
Our conclusion about these pepers hasn‘t
changed because our level of confidence has.
We concluded about two years ago
that we were about 70 per cent efficient,
Well, that was on the basis of rather flimsy
tests but on the basis of the studies that
Brandt has now completed, I have a pretty
high degree of confidence in this, at least
compared to a pot.
Of course we can't possibly say
that the pot is the absolute method either,
¥hat we want is comparison of the two things
we were interested in; one is the estimate
of etrontium as made by our gummed paper
method and the other is the measure of
strontium as found in the eoil,
This is really the test,
There is more than Just the ine
efficiency of the paper to coneider here
because as Harley points out, there is an
inherent fractionation of strontium 90 with
distance as well as the fact that there may
be selected physical separation of the
strontium 90 off of the parers.
a
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