METHOD OF DETERMINING Pr, Nd, Sm IN SOILS Russian patent published in 2014 - IPC G01N23/223 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to the field of soil chemistry, namely to methods of determining rare earth elements Pr, Nd and Sm in soils, and describes an X-ray radiometric energy-dispersive method of determination of the Pr, Nd and Sm content in soils, which includes the determination of elements Ba, La, Ce with a radioisotope source ²⁴¹Am by means of the following stages: accumulation of an initial spectrum of an analysed sample in an interval of energies 31-41 keV; building a model spectrum of interfering with their superposition K_β-lines of Ba, La and Ce with further determination of true intensities of spectral K_α-lines of Pr, Nd, Sm, calculation of the concentration of elements to be found by the generalised calibration curve of dependence of lanthanides La, Ce, Pr, Nd, Sm concentrations on intensities of the lines.

EFFECT: invention provides the determination of Pr, Nd and Sm concentrations in soils.

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