ASTM-D5580 2007

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D5580-02(2007) 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

Published By	Publication Date	Number of Pages
ASTM	2007	9

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Categories: 75.160.20 - Liquid fuels, ASTM

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Description

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 chromatography.

1.2 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 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 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 hydrocarbons. 1-Methylcyclopentene has also been found to elute from the precolumn to vent and does not interfere with benzene.

1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus FIG. 1
3	Reagents and Materials TABLE 1
4	Preparation of Columns Sampling Preparation of Apparatus and Establishment of Conditions
5	Calibration FIG. 2
6	TABLE 2
7	Column Conditioning Procedure Calculation and Report FIG. 3 TABLE 3
8	FIG. 4 FIG. 5
9	Precision and Bias Keywords TABLE 4 TABLE 5 TABLE 6

Additional information

Standard Title	D5580-02(2007) Standard Test Method for Determination of Benzene, Toluene, Ethylbenzene, p/m-Xylene, o-Xylene, C<sub>9</sub> and Heavier Aromatics, and Total Aromatics in Finished Gasoline by Gas Chromatography
Published Code	ASTM
Publication Date	2007
Pages Count	9
ICS Codes	75.160.20 - Liquid fuels

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ASTM-D5580 2007

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