Hydrogen Counter for Analysis of Dilute Tritium Oxide

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Abstract
This instrument, with modifications has been used for three years in the direct analysis of urine samples, water removed from the atmosphere by drying agents, and research samples with a minimum of maintenance difficulties. The most critical part of the equipment is adjustment of the quench circuit, but once this is accomplished the operation is quite simple. One technician can analyze up to eight samples per hour. Although a preferential reaction of the tritiated water with calcium exists such that the resulting gaseous phase is depleted in tritium, no difficulty is encountered in practice, since the reaction always takes place under the same conditions, i.e. a large excess of liquid samples. Thus if the instrument is calibrated against samples of known tritium content, reproducible results are obtained.

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