METHOD OF EVALUATING INDUCTION PERIOD OF MOTOR GASOLINES Russian patent published in 2007 - IPC G01N33/22 

FIELD: petroleum product test methods.

SUBSTANCE: invention relates to petroleum product testing area and mainly to evaluation of chemical stability of motor gasolines to provide methods applicable in research institutions, in refinery laboratories, and at enterprises dealing with development and application of motor fuels as well as with problems concerning preservation of automobile gasolines during storage and transportation periods. In a method of evaluating induction period of motor gasolines from sample oxidation time at 100°C calculated in terms of a mathematic relationship using an informational parameter of the sample, the latter is content of unsaturated hydrocarbons Cn, which is preliminarily determined in the sample, and sample oxidation time at 100°C (τ100) is calculated in terms of following relationship: τ100 = k1Ln(Cn)+k2, where k1 and k2 are empirical constants.

EFFECT: accelerated motor gasoline induction period evaluation without reduction in requirements to accuracy and reliability and increased determination safety.

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