... gas chromatographs type 3700 and Tsvet-800, densitometers ANT-2 for gasoline, refractometer IRF-454B2M, stand- ard fuels (isooctane and n-heptane), natural gas-condensate distillates, gasoline and catalyzate of molecular sieve reforming; methods of gas chromatography, infrared spectrometry, refractometry and densitometry. Results Some metrological properties of different in direct methods for knock resistan ceestimation investigated. Several consistent patterns witch establish a scope of such techniquesobtained....

... chromatograph type 3700, densitometers ANT-2 for gasoline, standard fuels (isooctane and n-heptane), gasoline A-76, gasoline Normal-80, gasoline Regular-92, stable catalyzate of molecular sieve reforming, natural hydrocarbon distillates; methods of gas chromatography and densitometry. Results A new laboratory method was demonstrated to be an effective for the determination of octane numbers in gasoline samples. The method is easy for use, fast and cost-effective. A typical analysis takes less than ...

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