Chemical analysis of UF4 obtained in a wet process
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The chemical analysis of hydrated uranium tetrafluoride is described. This product was obtained in a wet process. Several methods were taken into account and applied to this product. In the case of uranium the following techniques were employed: isotope dilution with mass spectrometry, X-ray fluorescence, volumetric measurements, spectrophotometry, Volkovs's method, natural radioactivity measurements using the 185 keV235U peak and neuton activation analysis. In the case of fluoride determination, four methods gave good results. An explanation is given for a discrepancy appearing in one case. Free water in the product was determined in the classical way at 105 °C, with the Karl Fischer reagent and by thermogravimetric analysis. Hydration water was also estimated from thermogravimetric determinations in nitrogen to avoid product oxidation. Thus the formula UF42·2H2O was found. Other impurities were determined by emission spectroscopy, mass spectrometry, neutron activation and chemical analysis.
KeywordsUranium Uranium Concentration Hydration Water H2SiF6 Ammonium Vanadate
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