Abstract
Hydrogen, as tritium, extracted from aluminum by solid extraction methods and assayed in an ion chamber can be measured to a level of about 3 x 10/ sup -10/ ml at STP. The method compares well with existing solid extraction methods for assaying nonradioactive hydrogen and is as reproducible. Sensitivity far exceeds existing methods and the radiochemical method requires no troublesome surface gas corrections, Tritium activities between 10/sup -9/ and 10/sup -2/ c can be measured routinely. Isotope effects were found only for the atinck of condensed tritiated water on aluminum powder at room temperature.
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