METHOD OF EXTRACTING 3,4-BENZ(A)PYRENE FROM SOIL, BOTTOM DEPOSITS AND WASTE WATER SLUDGE Russian patent published in 2013 - IPC C07D303/17 C07D301/32 C02F1/26 C02F101/30 B09C1/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of extracting 3,4-benz(a)pyrene, having high toxicity and carcinogenic properties, from soil, bottom deposits and waste water sludge. The method involves mixing the analysed sample in powder form with a liquid extractant in a given volume ratio, heating the obtained mixture with thermal ageing which allows the transfer of 3,4-benz(a)pyrene into the solution, filtering the solution by decantation, adding an extractant of corresponding polarity to the analysed compound, followed by evaporation of the solution to a dry substrate and determining the amount of 3,4-benz(a)pyrene by liquid chromatography. The liquid extractant used is distilled water. Heating and thermal ageing of the obtained mixture are carried out in a sealed reactor and once the 3,4-benz(a)pyrene is transferred into the solution, the reactor is cooled to room temperature.

EFFECT: using a simple technology, the method enables to cut the duration and number of steps of extraction and increases the output of the extracted 3,4-benz(a)pyrene.

5 cl, 5 ex, 2 tbl, 3 dwg