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SRPS B.H8.133:2014

Standard 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

Feb 28, 2014

General information

60.60     Feb 28, 2014

ISS

B028-2

75.160.20  

English  

van plana za 2013. godinu.

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Scope

This test method covers the determination of benzene, toluene, ethylbenzene, the xylenes, C9 and heavier aromatics, and total aromatics in finished motor gasoline by gas chromatography. The aromatic hydrocarbons are separated without interferences from other hydrocarbons in finished gasoline. Nonaromatic hydrocarbons having a boiling point greater than n-dodecane may 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. 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 C8 aromatics, 0.5 to 10 %; total C9 and heavier aromatics, 5 to 30 %, and total aromatics, 10 to 80 %. Results are reported to the nearest 0.01 % by either mass or by liquid volume. 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), tertamylmethylether (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 hydrocarbons.
1-Methylcyclopentene has also been found to elute from the precolumn to vent and does not interfere with benzene.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS B.H8.133:2012

NOW

PUBLISHED
SRPS B.H8.133:2014
60.60 Standard published
Feb 28, 2014

Related project

Adopted from ASTM D5580-13