[en] The paper contains the results of the further investigation of the quenching effects of a number of elements on the uranium fluorescence excited by UV light in a NaF/LiF flux. A series of new half-concentration values (c₁sub(/)₂) was determined and a semilogarithmic dependance of this figure, which characterizes the quenching effect, upon the atomic number Z of the corresponding element found. Within certain limits this makes possible a prediction of quenching effects. A formula for the description of the quenching behavior of element mixtures was derived and tested experimentally. (orig.)