Abstract
A very crystalline precipitate of uranium quinolin-8-olate (uranyl oxinate) has been obtained from homogeneous solution by utilising urea hydrolysis to raise the pH of the initially acid solution of uranium (VI) in the presence of sodium acetate and the precipitant. The precipitate so obtained is stoichiometric unlike the one obtained in conventional precipitation and posseses the same composition (uranium: oxine ratio) irrespective of the pH of the final solution unlike that obtained in earlier PFHS methods. The results obtained show that the determination is not affected by the presence of other metal ions when the precipitation is carried out in the presence of EDTA and the precipitate obtained by PFHS is also more thermally stable.
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