LED-Dip probe based spectroscopic estimation of uranium in nitric acid medium

An ideal materials accountability technique for proliferation resistance should provide nondestructive, real time, on-line information of metal and ligand concentrations in separation streams without perturbing the process. UV-Visible spectroscopy can be adopted for this precise purpose in solvent extraction-based separations. In general, UV-Visible spectroscopy is a reliable method for U concentration determination. However, UV visible spectroscopy in nitrate matrices is complex due to nitrate concentration altering uranyI speciation, and therefore its absorption spectrum. In the present work, the several samples consisting of scrap UO₂ pellets dissolved in nitric acid and blended with miscellaneous solutions from plant were extensively analysed by the present LED based dip probe spectrophotometry, and compared with the analyses results obtained by other method such as EDXRF and ICP-AAS. The statistical analyses of 90 sample points were carried out to understand the normal distribution of random errors and comparison with the other methods