Abstract
Gravimetric measurement of U content in UO3 with ignition in air has been investigated. The ignition temperature, ignition time and aliquot sample mass are optimized as 900 °C, 60 min, and 1 g, respectively. The method is validated by isotope dilution mass spectrometry (IDMS) with uncertainty estimation. The obtained result by gravimetry is 0.78287 ± 0.00051 g/g (k = 2) and agreed with IDMS value. It has been found that U in UO3 can be measured accurately and precisely by gravimetry.
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