Biamperometric methodology for sequential determination of thorium and uranium

Direct Compositional Characterization of (U,Th)O2 Powders, Microspheres, and Pellets Using TXRF

“…Some of the pellet samples from Table and some additional pellets also were dissolved to countercheck the TXRF methodology using biamperometry. For such studies, the samples were dissolved and specimens prepared as described in the literature . Using such an approach, both uranium and thorium were analyzed, and the uranium at% in (U + Th) in these pellets was determined.…”

“…The results obtained were compared with the TXRF determined values. The dissolution and sample preparation for the biamperometric analysis is described in literature…”

“…The results obtained were compared with the TXRF determined values. The dissolution and sample preparation for the biamperometric analysis is described in literature 18 ■ RESULTS AND DISCUSSION As stated above, the relative sensitivities of U Lα and Th Lα were determined using a synthetic U and Th solution mixed with Ga internal standard. The TXRF spectra of these solutions were processed by the computer program EDXRF32 provided with the instrument.…”

“…For such studies, the samples were dissolved and specimens prepared as described in the literature. 18 Using such an approach, both uranium and thorium were analyzed, and the uranium at% in (U + Th) in these pellets was determined. A bar graph representing the expected TXRF-and biamperometrically determined uranium at% is shown in Figure 8.…”