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- W2085644936 abstract "Abstract A method is presented for the direct determination of uranium in uranium compounds containing up to several percent impurities with a precision of 0.04% at the 95% confidence interval. The method is simple and is a significant improvement over existing methods for analysis of this type of material. A sample containing about 2.5 g of uranium is dissolved in strong phosphoric acid and uranium(VI) is reduced with iron(II). After selective oxidation of the excess of iron(II) with nitrate in presence of molybdate catalyst, a small excess of potassium dichromate is added to oxidize uranium(IV) to uranium(VI). The excess of chromium(VI) is determined colorimetrically with diphenylcarbazide. The method requires some prior knowledge of the uranium content of the sample. It can be applied even in the presence of percent levels of impurities such as iron, nickel, and chromium. Copper, however, at concentrations of more than 1% of the uranium causes a low bias." @default.
- W2085644936 created "2016-06-24" @default.
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- W2085644936 date "1970-03-01" @default.
- W2085644936 modified "2023-09-26" @default.
- W2085644936 title "The precise determination of uranium in impure Uranyl Nitrate and Uranium oxides" @default.
- W2085644936 doi "https://doi.org/10.1016/s0003-2670(00)86814-2" @default.
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