FIELD: production of building materials. SUBSTANCE: first, samples are prepared with predetermined content of components to be analyzed, followed by measuring degree of whiteness of resulting powdery mixture using whiteness measuring instrument either visually, or by comparing whiteness of reference sample with actually measured degree of whiteness of mixture. As a result, percentage of components to be analyzed are determined. Method is fool-proof. EFFECT: high-speed analytical procedure; accessibility and easy availability for enterprises due to considerable simplification and reduction of cost. 2 tbl
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