SAMPLING INVESTIGATIONS FOR THE ATOMIC EMISSION SPECTRAL ANALYSIS
In order to increase the limits of sensitivity and accuracy of measurements of heavy metals by atomic emission spectral analysis, studies of samples taken to determine the elemental composition were carried out. The requirements for the selection of a representative sample are analyzed, recommendations for the preparation of a sample for spectral analysis are presented, taking into account the homogeneity and shape of the sample. The studies carried out to improve the accuracy of measurements of the quantitative composition by fulfilling the requirements for sampling taken at the territory of the thermal power plant in Bishkek, made it possible to determine the content of 7 chemical elements belonging to the group of heavy metals using an improved method. The measurements were carried out in the optimal mode of operation in the plasma flow of the DGP-50M two-jet plasmatron. The results of improved quantitative atomic emission spectral analysis for determining the content of trace elements in soils are presented.