Abstract
An extraction of molybdenum is described that provides a more predictable separation over a significantly wider acidity range than previously determined. The extraction of Mo appeared to be a function of HCl normality, with virtually complete separation above 3.6 N. A test was conducted to determine if the extraction was a function of just HCl concentration or of overall acidity. When the aqueous phases of the test sequence were all prepared at 1 N H/sub 2/SO/sub 4/ in addition to the HCl in each, the resulting extraction curves were essentially identical. Another test was performed to determine if Mo was being extracted as an iodide complex. Three aqueous solutions, which were 4 N in HCl and 26% (w/v) ascorbic acid, were prepared in culture tubes. When 25 ..mu..g of Mo was extracted from these solutions of 5 mL of organic phase, the KCl gave only a 16% extraction, the KBr gave only a 22% extraction, and the KI provided an essentially total extraction. 4 references, 1 figure.
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