ASTM D5580-15(R2020) pdf free download

ASTM D5580-15(R2020) pdf free download.Standard Test Method for Determination of Benzene, Toluene, Ethylbenzene
1. Scope
1.1 This test method covers the determination of benzene, toluene, ethylbenzene, the xylenes, C 9 and heavier aromatics, and total aromatics in finished motor gasoline by gas chroma- tography. 1.2 The aromatic hydrocarbons are separated without inter- ferences from other hydrocarbons in finished gasoline. Non- aromatic hydrocarbons having a boiling point greater than n-dodecane may cause interferences with the determination of the C 9 and heavier aromatics. For the C 8 aromatics, p-xylene and m-xylene co-elute while ethylbenzene and o-xylene are separated. The C 9 and heavier aromatics are determined as a single group. 1.3 This test method covers the following concentration ranges, in liquid volume %, for the preceding aromatics: benzene, 0.1 % to 5 %; toluene, 1 % to 15 %; individual C 8 aromatics, 0.5 % to 10 %; total C 9 and heavier aromatics, 5 % to 30 %, and total aromatics, 10 % to 80 %. 1.4 Results are reported to the nearest 0.01 % by either mass or by liquid volume. 1.5 This test method includes a relative bias section for U.S. EPA spark-ignition engine fuel regulations reporting for ben- zene based on Practice D6708 accuracy assessment between Test Method D5580 and Test Method D3606 as a possible Test Method D5580 alternative to Test Method D3606. The Practice D6708 derived correlation equation is only applicable for fuels in the benzene concentration range from 0.0 % to 2.31 % by volume as measured by Test Method D5580. The applicable Test Method D3606 range for benzene is from 0.0 % to 2.38 % by volume as reported by Test Method D3606. 1.6 This test method includes a relative bias section for U.S. EPA spark-ignition engine fuel regulations for total aromatics reporting based on Practice D6708 accuracy assessment be-tween Test Method D5580 and Test Method D5769 as a possible Test Method D5580 alternative to Test Method D5769. The Practice D6708 derived correlation equation(s) is only applicable for fuels in the total aromatic concentration range from 5.4 % to 31.6 % by volume as measured by Test Method D5580 and a distillation temperature T 95 , at which 95 % of the sample has evaporated, as measured by Test Method D86 is in the range of 149.1 °C to 196.6 °C (300.4 °F to 385.9 °F). 1.6.1 The applicable Test Method D5769 range for total aromatics is from 3.7 % to 29.4 % by volume as reported by Test Method D5769 and the distillation temperature T 95 , at which 95 % of the sample has evaporated, when tested according to Test Method D86 ranged from 149.1 °C to 196.6 °C (300.4 °F to 385.9 °F). 1.7 Many of the common alcohols and ethers that are added to gasoline to reduce carbon monoxide emissions and increase octane, do not interfere with the analysis. Ethers such as methyl tert-butylether (MTBE), ethyl tert-butylether (ETBE), tert- amylmethylether (TAME), and diisopropylether (DIPE) have been found to elute from the precolumn with the nonaromatic hydrocarbons to vent. Other oxygenates, including methanol and ethanol elute before benzene and the aromatic hydrocar- bons. 1-Methylcyclopentene has also been found to elute from the precolumn to vent and does not interfere with benzene. 1.8 The values stated in SI units are to be regarded as standard.1.8.1 Exception—The values given in parentheses are for information only. 1.9 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.10 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.