Precise determination of uranium in rocks and minerals by neutron activation analysis using 133I fission product |
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| Authors: | G Del Fiore JM Peters I Roelandts |
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| Institution: | 1. Laboratory for the Application of Radioelements, University of Liège, Liège Belgium;2. Geology, Petrology and Geochemistry, University of Liège, Liège Belgium |
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| Abstract: | A radiochemical neutron activation technique for uranium determination in rock and mineral samples is presented. The method is based on an alkaline fusion, a selective oxidation of iodine by a sodium-nitrite solution, followed by an iodine distillation technique for the isolation of the 133I produced in fission. The outlined scheme is rapid, sensitive and reliable. Determination of uranium in U.S. Geological Survey standard rocks (G-1, W-1, G-2, BCR-1, AGV-1, GSP-1), C.R.P.G. Nancy geochemical standards (GA, GH, BR, Mica-Fe, Mica-Mg), C.A.A.S. reference syenite rocks (SY-1, SY-2, SY-3) and other analysed rock samples are reported. These results are compared with those obtained by other methods. |
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