Activation analysis of tin at nanogram level by liquid scintillation counting of121Sn |
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Authors: | A. R. Byrne |
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Affiliation: | (1) University of Ljubljana, 61000 Ljubljana, “J. Stefan” Institute, Yugoslavia |
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Abstract: | Tin is determined at the low nanogram level in biological samples by neutron activation using the pure β−emitter121Sn 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. |
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