Hydrogen tritium exchange

The tritiated version could be prepared from tritiated formic acid which we had prepared at high specific activity (2.5 Ci mmol-1) by a metal-catalyzed hydrogen-tritium exchange procedure using T2 gas. The material can be stored either as a solid or as a solution if the latter any release of tritium by back exchange can be easily monitored by 3H NMR spectroscopy. In our experience very little exchange occurs over several weeks of storage [51]. 

Figure 2 Rate profiles for acid-catalyzed hydrogen-tritium exchange of (a) 2,4,6-trimethylpyridine and (b) its /V-methyl salt...

Hydrogen-Tritium Exchange Studies. The alloy to be studied was placed between porous nickel frits in a tube 4 in. long with %-in. i.d. This sample tube was inserted as part of a closed loop of y4-in. stainless steel tubing. 

Hydrogen-Tritium Exchange Studies. Isotope exchange experiments were conducted as described previously for the 7-phase hydrides (except TiMo2, that does not form the 7-phase). The results of the isotope separation determinations are shown in Table VI, where the parameter a is defined as ... 

Ultra-violet light irradiation of tritiated naphthalene in methanol containing tertiary amines has been reported to lead to hydrogen-tritium exchange. Electron transfer from the amine to the excited state of the arene and protonation of the resulting radical anion is implicated. 

Figure 20, Hydrogen-tritium exchange of ihionein and metallothionein...

Figure 24. Hydrogen-tritium exchange of APO- and iron transferrin O.m tris-C/, pH 8.0, 4°...

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