CATION EXCHANGE SEPARATION-EMISSION SPECTROGRAPHIC DETERMINATION OF BORON IN URANIUM METAL OR URANIUM OXIDE

The spectrochemical method of determination of extremely low concentration,of boron in uranium is described here. The sample is dissolved in HNO_3 aftermannitol is added to complex boron. Then boron is separated from uranium bycation exchange method. After that, the solution of boron is evaporated to dry-ness at low temperature and redissolved in 0.5ml solution containing NaF as anew matrix and Be as an internal standard. Then it is evaporated to dryness oncarbon electrode and exciteded by AC arc. The proposed method can determine as little as 0.012ppm boron with 0.4gsamples. The percentage of recovery is(108～111)%. The relative standard deviationis less than±18% when concentration of boron is 0.012ppm, and less than±9%when concentration of boron is 0,04ppm. The method is simple, rapid sensitiveand reliable. The analytical results of several standard samples agree with those obtainedby other methods.