FIELD: chemistry.
SUBSTANCE: method includes measuring an information parameter such as specific magnetic susceptibility and calculating the corresponding octane number using the empirical relationship Z=-8·1011·χ5+3·1012·χ4-6·1012·χ3+5·1012·χ2-2·1012·χ+4·1011 (2), where Z is the octane number based on the analysis method, units; χ is specific magnetic susceptibility, 106, g-1.
EFFECT: faster and more reliable determination.
1 ex, 1 tbl
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