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Significance and Use
5.1 Regulations in some jurisdictions, such as California, limit the concentration of benzene and total aromatic content of denatured fuel ethanol in order to reduce the ozone reactivity and toxicity of automotive evaporative and exhaust emissions. Results from this test method may be used to assess product quality and to meet new fuel regulations.
1. Scope
1.1 This test method covers the determination of benzene and total aromatics in finished denatured fuel ethanol by gas chromatography.
1.2 Total aromatics are determined by adding the concentrations of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, and C9 and heavier aromatics.
1.3 The 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.
1.4 This 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.
1.5 Results are reported to the nearest 0.01 % by mass or liquid volume.
1.6 The values stated in SI units are to be regarded as standard.
1.6.1 Exception—The values given in parentheses are provided for information only; they may not be exact equivalents.
1.7 This 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards
D5580 Test Method for Determination of Benzene, Toluene, Ethylbenzene, p/m-Xylene, o-Xylene, C9 and Heavier Aromatics, and Total Aromatics in Finished Gasoline by Gas Chromatography
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
E355 Practice for Gas Chromatography Terms and Relationships
ICS Code
ICS Number Code 75.160.20 (Liquid fuels)
UNSPSC Code
UNSPSC Code 15100000(Fuels)
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DOI: 10.1520/D7576-16
Citation Format
ASTM D7576-16, Standard Test Method for Determination of Benzene and Total Aromatics in Denatured Fuel Ethanol by Gas Chromatography, ASTM International, West Conshohocken, PA, 2016, www.astm.org
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