Re: I-129 in C-14 Sodium Acetate

[Schoenhofer <schoenho@via.at>]

At 07:08 09.10.1996 -0500, you wrote:
>     
>     We have several sealed ampules of Sodium Acetate-1-14C (.5 mCi each). 
>     There seems to be a small (nCi) amount of I-129 in each one. Any 
>     explanations? 
>--------------------------------------------------------------------------

My first thought was also: How did you measure it? I-129 is extremely
longlived and has therefore a very low specific activity. Usual techniques
for measurement are neutron activation and in recent time ICP-MS. All these
techniques require treatment of the sample. I would not rely on for instance
Bremsstrahlung as a mean for determination of beta-emitters.

Franz
Schoenhofer
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