Abstract
An atomic absorption method for determining a small amounts of magnesium in uranium has been studied. About 3g uranium metal is decomposed by 1: 1 hydrochloric acid in platinum dish and dissloved completely by adding hydrogen peroxide. After decomposition of the sample, uranium is removed by extraction with TBP-chlorof orm solution. Aqueous layer is washed with chloroform in order to remove TBP and evaporated to dryness.
The residue is treated with dilute hydrochloric acid and calcium solution (2mg/ml) which can prevent the interference effects of aluminium and phosphorus, then made up to 10 ml.The sample solution is sprayed into an air-methane flame and the absorption by the latter of the atomic resonance line of magnesium at 285 mμ is measured. By this method, 0.5-15 μg/ml of magnesium in solution can be determined in the presence of aluminium and phosphorus.
