FIELD: gas chromatographic analysis of microconcentrations of organic substances in air. SUBSTANCE: invention specifically refers to qualitative and quantitative analysis of sum and individual polar low-volatile organic substances in atmospheric air in populated areas or in air of production zone. Sum of polar low-volatile organic compounds is extracted from sample of air, prepared sample is deposited on hard sorbent which is placed into chromatographic column of first chromatograph fitted with heat conduction detector, sample is prepared for analysis by way of passing of inert gas at temperature of 30-60 C till volatile organic solvent is removed totally, model mixture of two hydrocarbons, hexane and benzene in particular, is injected, time of benzene holding relative to hexane and air at temperature of 30 C in thermostat is measured, volume of holding of benzene relative to hexane and air at preset velocity of carrier gas from 5 to 40 ml/min is determined. Then carrier gas from column of first chromatograph is passed into column of second chromatograph with heat conduction detector with periodic injection of model mixture of same hydrocarbons till all organic substances are removed totally. In this case temperature in thermostat of first chromatograph is raised to boiling point of low-boiling component. After this each polar low-volatile organic compound is identified with reference to volumes of holding of benzene computed by time of holding of benzene relative to hexane and air. Concentration of polar low-volatile organic compound is determined by dependence of volume of holding of benzene relative to hexane and air on its mass. EFFECT: increased authenticity of qualitative analysis of individual polar low-volatile organic compounds, full usage of prepared sample for analysis. 6 tbl
