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1.1 ,This test method covers the determination of the ethanol content of hydrocarbon blends containing greater than 20 ,% ethanol. This method is applicable to denatured fuel ethanol, ethanol fuel blends, and mid-level ethanol blends.
1.1.1 ,Ethanol is determined from 20 ,% by mass to 100 ,% by mass and methanol is determined from 0.01 ,% by mass to 0.6 ,% by mass. Equations used to convert these individual alcohols from percent by mass to percent by volume are provided.
Note 1: ,Fuels containing less than 20 ,% ethanol may be quantified using Test Method D5599, and less than 12 ,% ethanol may be quantified using Test Method D4815.