Determination of refractory elements in U(3)O(8) by carrier distillation emission spectrography |
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Authors: | Dalvi A G Deodhar C S Sheshagiri T K Khalap M S Joshi B D |
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Institution: | Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Bombay 400085, India. |
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Abstract: | An emission spectrographic method using carrier distillation for the determination of the refractory impurities Ta, Hf, Nb, Th, and W in uranium is described. Different carriers, such as Ga2O3, AgCl, AgCl + LiF, and AgCl + NaF in various proportions, were investigated: a 1% NaF + 9% AgCl mixture as carrier at 10% of total charge arced was found to be the most suitable. Spectra were excited in a d.c. arc at 12 A and were photographed with 35-sec exposures. Palladium was used as an internal standard. The lowest limits of determination lie in the range 1–10 ppm for a 100-mg charge. The precision of the method is about 16% or better. |
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