Chromatographic Determination of the Concentration of Organochlorine Compounds in Crude Oil and Petroleum Products

A chromatographic method for determining the mass fraction of organochlorine compounds in oil and its refined products has been developed. An inert gas is bubbled through a container filled with the analyzed liquid; the flow of the inert gas containing vapors of organochlorine compounds is divided into two parallel flows in the chromatograph; one of the two flows is separated with a capillary chromatographic column, while the other, with a polycapillary chromatographic column, both at a constant temperature. The organochlorine compounds are detected with a single electron-capture detector connected to each of the two flows in accordance with the release time of a definite organochlorine compound. The developed method allows automated measurements of mass fraction of organochlorine compounds in oil and its refined products using flow gas chromatographs of explosion-proof design; the analysis time decreases, and the losses due to contamination of feedstock with organochlorine compounds at oil refineries and oil transportation enterprises are reduced.