Abstract
A new method is introduced to estimate uranium(VI) spectrophotometrically by extraction of its ferron (7-iodo-8-hydroxyquinoline-5-sulfonic acid) complex with 1% tridodecylamine in chloroform at pH 4.5. The optimum absorption wavelength is 380 nm. The stoichiometry of the uranium-ferron complex as indicated by a mole ratio plot is 1:2 and its dissociation constant is 3.24·10−9. The effects of various parameters on the absorption are studied. This method has a sensitivity of 0.028 ppm on Sandell's scale. Interferences are described.
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