Use of kinetic luminescence characteristics for determination of uranium mass fraction in parent substance

A study was made on factors, affecting uranium determination according to the value of initial luminescence (L) intensity in the presence of quencher during excitation by pulsed laser radiation. It is shown that errors for temperature dependence of L and absorption of exciting light in quencher solution should be introduced in order to obtain reliable results. Application of kinetic L characteristics enables to deternine simultaneously the uranium concentration, quencher concentration and therefore to determine uranium fraction of total mass in quencher which represents the base of analyzed sample. Investigations were conducted after the example of uranium determination in iron solution and phosphoric acid solution of 1 mol/l concentration. Relative standard deviation was equal to 5 % at 0.08 % uranium fraction of total mass and insufficient deviation of determined value from the real one