Author: A. Byrne 1
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  • 1 University of Ljubljana 61000 Ljubljana “J. Stefan” Institute Yugoslavia
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Tin is determined at the low nanogram level in biological samples by neutron activation using the pure βemitter121Sn of half-life 27 hours. The method is based on the concept of extracting tin selectively into an organic phase, which, after addition of a scintillant (PPO), can be directly counted by liquid scintillation counting with near 100% efficiency. Tin is first selectively extracted as its iodide into toluene, stripped and then re-extracted selectively into a toluene solution of N-benzoyl N-phenylhydroxylamine for scintillation counting. Results are given for various biological reference materials.