METHOD FOR DETERMINING MARKERS OF TRANSPORTED OIL AND OIL PRODUCTS, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC G01N30/00 

FIELD: measurement equipment.

SUBSTANCE: invention refers to gas chromatographic methods of analysis and may by used in oil industry and other industries for hidden marking of oil and oil products during various expertises in commercial and industrial enterprises. Essence of equipment consists in the following: volatile compounds (markers) are extracted from oil by airlift contact of gas flow with solution of volatile markers in low-volatile solvent (oil or oil products) with subsequent headspace analysis by method of gas chromatography. As volatile markers, used are aliphatic monobasic alcohols and their mixtures, and gas flow, saturated with volatile compounds (alcohol markers and petroleum hydrocarbons), are bubbled through non-polar solvent for removal of oil volatile hydrocarbons. Then gas flow saturated with volatile alcohol markers is bubbled through a small volume of distilled water to obtain concentrated aqueous solution of alcohol marker, which is dosed to gas chromatograph for analysis. Device for the method implementation includes series-connected unit for gas preparation and three series-connected bubble condensers, the first of which is filled with oil sample with volatile alcohol marker with volume V₁, the second - with non-polar solvent with volume V₂=V_i, and the third bubble condenser is filled with distilled water with volume V₃=0.01V₁.

EFFECT: increase of sensitivity of gas-chromatographic determination of volatile alcohol markers of transported oil and oil products.

2 cl, 1 dwg, 1 tbl