A unified methodological approach to the analysis of complex mixtures of volatile organic compounds in various media (air, water, soil), implemented with the use of universal methodological and instrumental bases, is substantiated. The main analytical method is the highly sensitive multivariate capillary gas chromatography in combination with other effective processes (gas extraction, sorption concentration, thermal desorption, cryogenic focusing etc.) applied in the operational line for sampling, sample preparation, pulsed sample introduction etc. Based on the metrological studies of the proposed basic technique for the analysis of multicomponent impurities (27 compounds in air samples) the techniques for measurement in air and water samples of mixed substances: gasoline, kerosene, white spirit and solvent oil were developed. The suggested principles of universality and unification of the operating series provide intensification and cheapening of their ecological control and monitoring.
A set of methods with a unified methodological, instrumental and metrological base, universal for analyzed media (air, water, soil) and controlled objects (industrial, working and sanitary zones) has been developed. The basic method is the technique of determination of 27 microstrokes of ephemeral organic compounds in air analyses. It is based on preliminary concentration of components from the vapor-gas phase on a hydrophobic adsorbent, their subsequent thermal desorption on a capillary column, detection and processing of its data using PAC "MultiChrome", based on the results of absolute graduation. Depending on the analytical task different types of capillary columns are used, and in some cases - preconcentration by creofocusing desorbed samples in the initial part of the column. For the analysis of water and soil samples the method of gas extraction with accumulation of special compounds on hydrophobizing adsorbent was used.
