FIELD: petroleum product investigation methods.
SUBSTANCE: in the method of invention, which can be used in carrying out of qualification tests and identification of fuels, 5 cm3 of gasoline sample is mixed with water at volume ratio 2:1, to resulting mixture is added 3 cm3 of 0.2 N potassium bichromate solution and sulfuric acid with density 1.8 g/cm3 taken at ratio 2:1, after which mixture is stirred and presence of alcohol in motor gasoline is judged of from green or blue coloration appeared in lower layer.
EFFECT: accelerated assessment procedure and avoided need in complex laboratory equipment.
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