METHOD FOR DETERMINING CONTENT OF POLYCYCLIC AROMATIC HYDROCARBONS IN RUBBERS AND TIRES Russian patent published in 2017 - IPC G01N30/14 

FIELD: chemistry.

SUBSTANCE: invention relates to the determination of individual polycyclic aromatic hydrocarbons (PAH) in rubbers (vulcanized and non-vulcanized) and tires produced from the rubber compounds. The claimed method for determining the content of polycyclic aromatic hydrocarbons in rubbers and tires consists in extracting a rubber or tire sample with toluene and then purifying the resulting extract from the interfering substances and concentrating the polycyclic aromatic hydrocarbons using silica gel column chromatography deactivated by water and then quantifying the content of the polycyclic aromatic hydrocarbons in the purified sample by gas chromatography with mass selective detection. In the column chromatography of the extract, the interfering substances are eluted with n-hexane previously equilibrated with water.

EFFECT: increasing the accuracy due to the separation of polycyclic aromatic hydrocarbons from the interfering components contained in the extract and shortening the determination time.

1 tbl