METHOD FOR DETERMINATION OF MONOMETHYL ANILINE IN HYDROCARBON FUELS Russian patent published in 2017 - IPC G01N33/22 

FIELD: chemistry.

SUBSTANCE: test fuel samples are applied on the plate for thin layer chromatography with silica gel sorbent with fluorescent indicator. Chromatography is carried out by ascending flow of eluent in the capacity of which mixture of heptane and acetone taken in the ratio 10:1 is used. The plate is air dried, chromatogram is visualized in ultraviolet light at wavelength of 254 nm without or with preliminary plate treatment with iodine vapors or in visible light after treatment with only iodine vapors, and presence of MMA in the fuel is assessed by availability on the chromatogram of a spot, which is violet-colored when observed in ultraviolet light or brown-colored when observed in visible light and R_f of which is 0.38±0.05; after that, the size of the spot with indicated R_f value is assessed and a preliminarily plotted calibrating curve is used to determine monomethyl aniline concentration in the test fuel.

EFFECT: use of the method allows to determine MMA content in hydrocarbon fuels with high accuracy.

3 dwg, 2 tbl, 1 ex