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1950's LLD for SR-90
During the mid 1950's did the counting equipment and radiochemistry technology have the capability of a LLD less than 1.0 pCi/gram of calcium for Sr-90? Seems good for today's standard.
Tom Lashley
LashleyT@DTEenergy.com
Jim Hardeman wrote:
> 10/21/99 Press Release in Manhattan re: Sr-90 in baby teeth:
>
>
> The largest majority of teeth analyzed by the RPHP researchers were from the 1979-92 period and contained Strontium-90 in the range of 1.1 - 2.0 picocuries per gram of calcium. A few of the teeth were found to have reached levels as high as 16 or 17 picocuries per gram calcium. Baby teeth from the middle 1950's that were tested in a St. Louis-based teeth study contained approximately similar average concentrations. "
>
> !
> !
>
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information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html