Spectrophotometric determination of cadmium in nuclear-grade Zircaloy-2 after selective extraction with a liquid anion-exchanger.
A method is presented for the spectrophotometric determination of cadmium in Zircaloy-2 at the tenths of ppm level. The method involves the extraction of Cd with tri-n-octylamine from 1M HCl, its separation from Fe(III) by scrubbing with tartaric acid, its recovery with 2M sulphuric acid, and the final development of the Cd-dithizonate colour. The method is simple and rapid, does not require any special instrumentation, and avoids the use of toxic reagents. Cadmium at the 0.3-ppm level has been determined with standard deviation 0.054 ppm.
Ghersini
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CISE Via Redecesio, 12 20090 Segrate (Milano Italy.
Mariottini
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