Determining of trace metals in nuclear-grade uranium dioxide by x-ray fluorescence spectrometry

✍ Scribed by Vera Lucia Ribeiro Salvador; Kengo Imakuma

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 257 KB
• Volume: 188
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86030-4

✦ Synopsis

A method is described for the simultaneous determination of low concentrations of Ca, Cr, Cu, Fe, Mn and Ni in nuclear-grade uranium dioxide by x-ray fluroescence spectrometry, without the use of chemical treatment. The lower limtis of detection range from 2 pg g-l for nickel and manganese to 5 Ng g-' for copper. Samples are prepared in the form of double-layer pellets with boric acid as a binding agent. Standards are prepared in a U,O, matrix, which is more chemically stable than UO, and has similar matrix behaviour. The correlation coefficients for calibration curves are better than 0.999 Errors range from 2.4% for chromium to 6.8% for nickel.