METHOD FOR IDENTIFYING FALSIFICATION OF AUTOMOTIVE GASOLINE Russian patent published in 2022 - IPC G01N33/22 G01N29/02 

FIELD: testing.

SUBSTANCE: area of application: for gasoline control. The substance of the invention consists in the fact that a 30 to 50 cm³ sample of gasoline is taken, held in a tightly sealed sampler for at least 15 minutes, the equilibrium gas phase (EGP) is injected into a detection cell, wherein the EGP is injected into a detection cell with four piezosensors installed therein, wherein on the electrodes of one of said sensors a sorbent is applied from a solution of dicyclohexane-18-crown-6 (18C6) in ethanol, of the second one, from a solution of polyoxyethylene-(21)-sorbitol-monooleate (Tween-40) in acetone, of the third one, from a solution of octylpolyethoxy-phenol Triton X-100 (TX-100) in acetone, and of the fourth one, from a solution of trioctylphosphineoxide (TOPO) in toluene, recording the responses of all piezosensors simultaneously for at least 30 s, the area S of the "visual imprint" of responses of the piezosensors in vapours of the gasoline samples is determined, based whereon a decision is made about the presence or absence of falsification of gasoline.

EFFECT: provided possibility of accurately estimating the quantitative content of impurities of another brand of fuel.

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