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On the assay of tritium as tritio-butane

1961; Pergamon Press; Volume: 11; Issue: 2-3 Linguagem: Inglês

10.1016/0020-708x(61)90144-2

1878-1284

Arthur Downes, A. R. Till,

Chemical Reactions and Isotopes

The technique described by Glascock for counting tritium as tritio- butane was examined for the effect of the Grignard reagent on results. Results show clearly that the exchange between Mg(OH)Br and the reacting TOH is fast enough to cause a lowering of the specific activity of the butane produced. It was concluded that differences between the observed and calculated results were possibly due to different exchange and reaction rates depending on the physical form of the dry Grignard reagent. Exposure of Grignard reagent to the atmosphere for even a few seconds was sufficient to produce significant errors in the specific activity of butane generated from small volumes of water. The absorption of moisture was approximately proportional to the exposure time up to 30 sec. (C.H.)