FIELD: measurement technology. SUBSTANCE: method involves carrying out gas chromatography analysis based on results obtained from two chromatographic analyses of the mixture in various quantities of introduced sample on the same column using peak area difference measured simultaneously with two detectors as chromatographic signal. The signals from individual components of the mixture are recorded. Concentrations are calculated by means of internal double standard interpolation method. Correction coefficients are normalized to the value of relative sensitivity coefficient of these detectors which depends on physical and chemical properties and molecular structure of substances under analysis. EFFECT: enhanced accuracy in determining concentration of individual substances in mixture. 2 tbl
