Abstract
Kjeldahl procedures were applied to the determination of nitrogen in uranium nitrides. There have been reported various dissolution reagents such as mixtures of hydrochloric, hydrofluoric, and sulfuric acids, sulfuric and perchloric acids, sulfuric acid and copper selenate. Preliminary dissolution tests, however, have shown that none of the dissolution reagents mentioned above are strong enough to dissolve the uranium nitride, even at high temperatures. The best result was obtained with a mixture of strong phosphoric and sulfuric acids. Compared with the other reported dissolution reagents, mentioned above, the proposed reagent gave excellent results with all the samples examined. Nitrogen recovery proved to be 100±0.50%.
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