FIELD: material analysis. SUBSTANCE: method involves evaluating the contents of two CA ingredients in two or more relationships (regressions) composed by using different groups of calibrated samples in the form of tablet-like samples differing from others taken from another group in factor levels inherent in the given group and invoking intensity degeneration of IA line of the ingredient to be determined. A sample of material under study or material close in properties to that mentioned above is treated in a way which is not present in any of known methods to make an additional independent regression model called baseline regression. For the baseline regression an auxiliary regression model is built so that it has a common solution with the baseline regression model. Estimated A-component contents in a material is based according to the given method on the quantitative comparison of A-component line intensity in the material with those of A-component in mixed samples to be performed by applying calculation methods. EFFECT: enhanced accuracy of analysis. 18 dwg, 31 tbl
