A simple spectrofluorimetric method to estimate uranium. Application to nuclear reprocessing solution

A simple spectrofluorimetric method is reported for the estimation of uranium (U) in nitric acid using 0.4 M H₂SO₄ as an enhancing reagent. The intensity of fluorescence peak of U at 512 nm with excitation at 414 nm shows linearity over 150-6000 µg/mL. Standard addition method is applied to arrive at the estimates of U in simulated dissolver and high active liquid waste solution of nuclear reprocessing plant. The estimate value of U for the sample with high content of other ions is found to be more accurate than the value measured by Davies-Gray method. (author)