Determination of uranium m uraniferous coal.

The uranium content of uraniferous coal has been determined by neutron-activation analysis. Carrier-free (239)Np is separated quantitatively and selectively by column extraction chromatography with glass powder as support and thenoyltrifluoroacetone in xylene as stationary phase. Only one purification step is involved.

Di-n-butyl carbamoylphosphonate as an extradant of inorganic ions from hydrochloric acid solutions.

The extraction of 33 elements by a 0.1M solution of di-n-butyl carbamoylphosphonate in chloroform has been investigated as a function of hydrochloric acid concentration. The results show that this new extradant readily extracts most of the elements in a high oxidation state, including the trivalent rare earths, from hydrochloric acid at concentrations greater than 6 M.