On-line time-resolved laser induced fluorescence of UO2(NO3)2•2TBP in supercritical fluid CO2

Time-resolved laser-induced fluorescence has been shown to be effective for on-line measurement of uranyl chelates in supercritical carbon dioxide. Quenching and other factors affecting the method's accuracy were identified and quantified to allow for accurate measurements under variable supercritical fluid conditions. The method was applied to the kinetic analysis of uranium extraction from acidic solutions with tributyl phosphate modified supercritical carbon dioxide.