A Review of the Methods Used for the Determination of Hydrogen in Uranium

Of the many published methods for determining hydrogen in uranium, those based on complete separation of the gas by vacuum or inert-gas extraction are the most satisfactory. When 5- to 10-gm samples are used, the average operator time can be reduced to about ten minutes per sample for either of these techniques. Routine operation of one inert-gas and six vacuum extraction units has produced an overall laboratory precision of ±0.3 ppm for production material containing up to 7 ppm hydrogen. Improved precision, at a considerable expense of time, can be obtained with larger samples.