In geological practice, simple productive methods of spectral analysis are successfully used for geochemical characterization of various complexes of rocks and ore occurrences when searching for ore deposits. The accuracy of content determination within some intervals (for example, 0.001-0.003; 0.003-0.01; 0.01-0.03%, etc.) when searching for scattering halos of molybdenum, tin, lead, zinc, tungsten and other ore components can be sufficient. But in a number of cases there is a need to apply mass methods of analysis with more accurate determination of the content of the elements under study.