A robust biamperometric titration methodology for the determination of uranium by Ti(III) reduction in the presence of plutonium
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P. R. Nair
Abstract
A biamperometric method is described for the determination of uranium in plutonium bearing nuclear fuel materials. Ti(III) is used for reducing U(VI) to U(IV) in 6 to 9 M H2SO4 medium, followed by destruction of the excess reductant by HNO3. Plutonium is also reduced to Pu(III), but is selectively oxidized to Pu(IV) by the HNO2 produced in situ during the destruction of the excess Ti(III) by HNO3. The U(IV) is determined by titration with standard K2Cr2O7. Accuracy and precision of the method have been evaluated using different amounts of uranium ranging from 5 microgram to 20 milligram. The method has been applied to U determination in uranium oxides, uranium carbides, (U,Pu)O2, (U,Th)O2, (U,Pu)C and U-Al alloy. The method has also been employed for the determination of U present at very low levels (<0.2%) in PuO2.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- TRLFS study on the complexation of Cm(III) with nitrate in the temperature range from 5 to 200 °C
- Rapid method for the determination of actinides in soil and sediment samples by alpha spectrometry
- Gas chemical investigation of hafnium and zirconium complexes with hexafluoroacetylacetone using preseparated short-lived radioisotopes
- A robust biamperometric titration methodology for the determination of uranium by Ti(III) reduction in the presence of plutonium
- Preparation and characterization of Zr-IV-containing Mg-Al-Cl layered double hydroxide
- Radiation and chemical stability of calix[4]arene derivatives as prospective liquid-liquid extractants
- A comparative study of neodymium sorption by yeast cells
- A novel technique for modifier free delivery of ligands for supercritical fluid extraction
- Measurement of I-129 in environmental samples by ICP-CRI-QMS: possibilities and limitations
- Incorporation of iodine into uranophane formed during the corrosion of spent nuclear fuel
