Modification of Davies & Gray method for uranium determination in phosphoric acid solutions
- Nuclear Materials Authority. P.O. Box 530, El Maddi, Cairo, Egypt.
- Chemistry Department, Faculty of Science, Banha University.
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The Davies-Gray method for uranium determination has been modified to facilitate the uranium determination in phosphoric acid solutions. In this concern, two phosphoric acid solutions, representing di-hydrate and high strength phosphoric acid, were prepared with different uranium concentrations. The concentration of uranium with the modified method was measured and compared with uranium determination with spectrophotometer method. The effect of different impurities in phosphoric acid such as; iron, fluoride, free sulfate, manganese, vanadium, and zinc on uranium concentration determination by the modified method were investigated. The obtained results clarify that, the modified method is applicable for uranium determination in both di-hydrate and high strength phosphoric acid in the range of ? 10 - 150 ppm uranium ion concentrations with high accuracy precision. The phosphoric acid impurities have almost no effect in uranium determination by using the modified method.
[N. M. Farag, G.O. EL-sayed, A. M. A. Morsy, M. H. Taha and M.M.Yousif (2015); Modification of Davies & Gray method for uranium determination in phosphoric acid solutions Int. J. of Adv. Res. 3 (Dec). 323-337] (ISSN 2320-5407). www.journalijar.com
