>I have been using a similar setup for D/H from water without much problem.
>Are you sure that all your uranium is at 850 deg C? If some uranium is at
>lower temperature, it acts like a sponge for hydrogen (actually, some
>people use uranium at lower temperature to temporarily adsorb hydrogen,
>releasing it later upon heating) leading to serious cross-contamination
>between successive hydrogen samples.
> Best wishes, Arndt Schimmelmann
It might of interest that Irving Friedman used uranium to "pump" or move
hydrogen in his vacuum lines and on his H/D machines.
Dr. Haraldur R. Karlsson
Associate Professor of Geosciences
Deptartment of Geosciences
Texas Tech University
Lubbock, TX 79409, USA