| abstract |
The invention belongs to the technical field of post-processing analysis of spent fuel, in particular to a method for analyzing and detecting trace amounts of thorium in neptunium dioxide samples. The trace amount of thorium in neptunium dioxide powder was separated by resin extraction, and the separated thorium-containing solution was measured by inductively coupled plasma spectrometer. At the same time, the TVEA extraction and separation resin column is used to improve the separation efficiency of trace thorium in neptunium dioxide and the precision of analysis and determination. Thorium can be separated from matrix elements by using TEVA resin. At the same time, inductively coupled plasma spectrometry has accurate results, few influencing factors, and good detection effect. The precision of the analytical method is better than 10%, and the recovery rate of standard addition is between 90% and 104%. between. |