Fluorescent Intensity of an Element in Two- and Multicomponent Mixtures

Abstract

The fluorescent intensity of an element in a mixture does not only depend upon its concentration but also upon the elements associated with it in the sample. The intensity of the fluorescent radiation of the element nickel in steel, for example, is six times lower than the intensity emitted by the same element when in aluminum and approximately thirty times lower when in an organic substance. Part of the primary tube radiation is absorbed by the associated elements and does not contribute to the excitation of secondary fluorescent radiation. Furthermore, absorption of secondary radiation in the sample depends upon the respective absorption coefficients, resulting in fluorescence of different intensities.