FIELD: chemistry.
SUBSTANCE: invention relates to methods for investigating a substance using an integral scintillation method and can be used to search for minerals and environmental contaminants. Summary: content of chemical elements in analyzed substance is determined. Searching indicator features and characteristics of the substance are determined using an integral scintillation method of analysis. At the same time virtual separation of the analyzed substance into a large number of small parts is carried out due to periodic intermittent synchronous short-term frame-by-frame recording of plasma spectra with continuous supply of the analyzed substance into it. Content of chemical elements is calculated taking into account the background under the analytical spectral line of the element from the value of the maximum signal measured on the selected portion of the spectrum next to the analytical line. Calibration graphs of chemical elements are plotted in simple coordinates taking into account electronic spectrometer noise. Correctness of the obtained content of the elements is evaluated by detecting the presence in the sample of content of indicator search elements close to the lower boundary of the quantitative definitions of that element. For this purpose, visual observation is performed on a display screen of frame sampling spectra transmitted from the spectrometer to a personal computer, with evaluation of frame-by-frame absence and presence of an analytical spectral line of the indicator element in frame-by-frame spectra, as well as the type of this line and the background located next to it in different frame-by-frame spectra of the analyzed sample. Number of particles of indicator elements is counted in the analyzed sample based on the presence of signals of the analyzed elements in frame-by-frame spectra of the sample, which are indicated in the final results of analyzing the search samples.
EFFECT: technical result is higher efficiency of mineral prospecting.
1 cl, 4 tbl, 1 dwg
