ASTM-D7754 2011

$44.96

D7754-11 Standard Test Method for Determination of Trace Oxygenates in Automotive Spark-Ignition Engine Fuel by Multidimensional Gas Chromatography

Published By	Publication Date	Number of Pages
ASTM	2011	17

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Categories: 75.160.20 - Liquid fuels, ASTM

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Description

ASTM D7754-11

Historical Standard: Standard Test Method for Determination of Trace Oxygenates in Automotive Spark-Ignition Engine Fuel by Multidimensional Gas Chromatography

ASTM D7754

Scope

1.1 This test method covers the determination of trace oxygenates in automotive spark-ignition engine fuel. The method used is a multidimensional gas chromatographic method using 1,2-dimethoxy ethane as the internal standard. The oxygenates that are analyzed are: methyl-tertiary butyl ether (MTBE), ethyl-tertiary butyl ether (ETBE), diisopropyl ether (DIPE), methanol, tertiary-amyl methyl ether (TAME), n-propanol, i-propanol, n-butanol, i-butanol, tert-butyl alcohol, sec-butyl alcohol, and tert-pentanol. Ethanol is usually not measured as a trace oxygenate since ethanol can be used as the main oxygenate compound in finished automotive spark-ignition fuels such as reformulated automotive spark-ignition fuels. The concentration range of the oxygenates covered in the ILS study was from 10 µg/Kg to 2000 µg/Kg. In addition this method is also suitable for the measurement of the C5 isomeric alcohols (2-methyl-1-butanol, 2-methyl-2-butanol) present from the fermentation of ethanol.

1.2 The ethanol blending concentration for which this test method applies ranges from 1 to 15% by volume. Higher concentrations of ethanol coelute with methanol in the analytical column. Lower levels of ethanol, similar to the other oxygenate, can be calibrated and analyzed also. If higher ethanol concentrations are expected, the window cutting technique can be used to avoid ethanol from entering the analytical column and interfere with the determination of the other oxygenates of interest. Refer to Appendix X1 for details.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3.1 Alternate units, in common usage, are also provided to increase clarity and aid the users of this test method.

1.4 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.

Keywords

alcohols; automotive spark-ignition fuel; ethers; gas chromatography; oxygenates

ICS Code

ICS Number Code 75.160.20 (Liquid fuels)

DOI: 10.1520/D7754-11

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus TABLE 1
3	FIG. 1 FIG. 2 FIG. 3
4	FIG. 4 TABLE 2
5	Reagents and Materials FIG. 5
6	Sampling Preparation of Apparatus and Establishment of Conditions FIG. 6
7	Calibration and Standardization
8	FIG. 7 FIG. 8
9	TABLE 3
10	Procedure FIG. 9 TABLE 4
11	Calculations and Reporting Quality Control Reference Material FIG. 10
12	Precision and Bias Keywords TABLE 5
13	X1. INDIVIDUAL OXYGENATE ANALYSIS X1.1 X1.2 X1.3 X1.4 TABLE 6 TABLE X1.1
14	X2. IDENTIFICATION OF OXYGENATE ANALYSIS X2.1 X2.2 FIG. X1.1 FIG. X2.1
15	FIG. X2.2 FIG. X2.3
16	X2.3 X3. ADDITIONAL METHODOLOGY X3.1 FIG. X2.4
17	FIG. X3.1

Additional information

Standard Title	D7754-11 Standard Test Method for Determination of Trace Oxygenates in Automotive Spark-Ignition Engine Fuel by Multidimensional Gas Chromatography
Published Code	ASTM
Publication Date	2011
Pages Count	17
ICS Codes	75.160.20 - Liquid fuels