Chemical separation and spectrographic estimation of rare earths and yttrium in PuO(2) and (U,Pu)O(2).
An emission spectrographic method for the estimation of rare-earth impurities in plutonium oxide and the mixed oxide (U,Pu)O(2) (30% PuO(2)-70% UO(2)) has been developed. Rare-earth impurities are separated from the matrix by solvent extraction with tri-n-octylamine in xylene and are estimated after concentration. Thulium is used as internal standard and LiF-AgCl as carrier. The spectra are excited in a d.c. arc. The detection limits lie in the range 0.004-0.1 mug and the coefficient of variation ranges from 5 to 23%.
Dalvi
A G
AG
Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Bombay 400085, India.
Deodhar
C S
CS
Joshi
B D
BD