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CADMIUM
Natural Abundance, Stable Isobars Cd 106, 1.22%, Pd106 Cd108, 0.88%, Pd108 Cd110, 12.39%, Pd110 Cd111, 12.75%, In113 Cd112, 24.07%, Sn112 aCd113, 12.26%, Sn114 Cd114, 28.86%, Sn116 Cd116, 7.58% Cadmium chloride, cadmium bromide, cadmium iodide, and cadmium metal have been used in the separation of cadmium isotopes. Although cadmium chloride was the most satisfactory of the halide charge compounds used in earlier isotope separations, recent experience indicates that higher enrichments are obtained when either cadmium oxide or cadmium metal is used. Little difference in performance is observed between cadmium oxide and cadmium metal; however, mossy Cd metal is the preferred charge material since it is easier to handle. The usual charge consists of 200 g Cd metal in a style C-16 graphite charge bottle. Both CdO and Cd metal are procured from commercial vendors and used without further processing. Cadmium chloride may be obtained from commercial sources; however, it has also been prepared in the laboratory by the action of chlorine gas on the metal under anhydrous conditions. Cadmium and its compounds are poisonous and inhalation, ingestion, or skin absorption must be prevented. The use of protective clothing, including rubber gloves, is recommended and good personal hygiene procedures should be followed. Cadmium compounds should be handled in fume hoods with good exhaust ventilation and, if necessary, supplied-air masks should be employed to ensure cadmium-free breathing. |
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