ASTM D 7576 : 2016 : REDLINE

1.1This test method covers the determination of benzene and total aromatics in finished denatured fuel ethanol by gas chromatography.

1.2Total aromatics are determined by adding the concentrations of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, and C₉ and heavier aromatics.

1.3The aromatic hydrocarbons are separated without interferences from other hydrocarbons in denatured fuel ethanol. Nonaromatic hydrocarbons having boiling point greater than that of n-dodecane can cause interferences with the determination of the C₉ and heavier aromatics. For the C₈ aromatics, p-xylene and m-xylene co-elute while ethylbenzene and o-xylene are separated. The C₉ and heavier aromatics are determined as a single group.

1.4This test method covers the following concentration ranges: benzene, 0.01 % to 0.08 % by mass and total aromatics, 0.29 % to 2.67 % by mass.

1.5Results are reported to the nearest 0.01 % by mass or liquid volume.

1.6The values stated in SI units are to be regarded as standard.

1.7This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.