METHOD OF DETERMINING TOTAL CONTENT OF OIL-PRODUCTS IN WATER Russian patent published in 2009 - IPC G01N30/02 

FIELD: physics; measurement.

SUBSTANCE: present invention pertains to chromatography and is meant for determining total content of oil-products in water. The invention can be used for measuring concentration of oil-product impurities in natural and sewage water during ecological monitoring and other tests on the environmental medium. The method of determining total content of oil-products in water involves putting a sample into a chromatographic column with a stream of carrier gas and subsequent detection in form of a continuous peak using a flame ionisation detector. Before analysis, the contaminated water sample is homogenised, adding, for example, dimethyl sulphoxide. The homogenous sample is pumped through a microconcentrator. Polar components of the sample and the homogenising solvent are removed by pumping pure water. The microconcentrator is put into a chromatograph evaporator and heated using an external heater. Desorption of oil-products takes place using water vapour, generated by a steam generator whose pressure can be regulated.

EFFECT: fast, convenient and accurate determination of total content of oil-products in water media for various domestic purposes.

3 cl, 3 ex, 2 tbl