On representativity of measured sample layer in X-ray fluorescence analysis of sulfide ores

Applicability of x-ray fluorescence determination of element composition of copper sulfide ores at some deposits in the South Ural is considered. Calculations of effective atomic numbers for maximum element compositions in solid and disseminated ores as well as in country rocks are performed. Results of saturated layer thickness calculation for these conditions are presented and evaluation of representativity of sample layer under investigation when determining Fe, Cu, Zn, Pb and Ba is given. Recommendations concerning optimization of sulfide ore powder sample preparation conditions in the course of x-ray fluorescence determinations of ore elements are given