METHOD FOR DETERMINATION OF CHEMICAL ELEMENTS CONTENT IN MATERIALS Russian patent published in 2011 - IPC G01N23/223 

FIELD: physics.

SUBSTANCE: one selects the optimal value of the matrix effect allowance coefficient d_k by way of registration of density of the quantum stream of characteristic radiation of elements being determined that are contained in M compared samples at H distances from the probe to the material surface with the help of random search method for the k^th information region of the spectrum corresponding to characteristic radiation of the k^th element. For the i^th sample compared one plots the diagram of dependence of the analytic parameter p_ij representing integral density of the quantum stream of the characteristic radiation of the k^th element with account for the optimal values of the matrix effect allowance coefficient d_k, from the probe-material distance h. One performs ore irradiation at a fixed distance of H_f from the probe to the conveyor belt surface, measures the current value of distance h₀ from the probe to the ore surface (for this one calculates the analytic parameter p₀ representing integral density of the quantum stream of the characteristic radiation of the k^th element n_k with account for the optimal values of the matrix effect allowance coefficient d_k. From the dependence diagram P_i(h) one determines the a and b coefficients of allowance for the geometry changes occurring when the distance is changed from h=H_f to h=h₀. Elements concentration is determined from the expression: c₀ = a · p₀ + b.

EFFECT: higher accuracy of ore sampling.

1 tbl, 2 dwg