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Significance and Use
4.1 Knowledge of the concentration of benzene may be required for regulatory use, control of gasoline blending, and/or process optimizations.
1.1 This test method covers the determination of benzene and toluene in finished motor and aviation spark ignition fuels by gas chromatography. This test method has two procedures: Procedure A uses capillary column gas chromatography and Procedure B uses packed column gas chromatography. Procedures A and B have separate precisions.
1.2 The method working range for benzene is in the expected concentrations of: (1) Procedure A between 0.12 % and 5.2 % by volume and (2) Procedure B between 0.10 % and 5.0 % by volume.
1.3 The method working range for toluene is in the expected concentrations of: (1) Procedure A between 0.4 % and 19.7 % by volume, and (2) Procedure B between 2.0 % and 20.0 % by volume.
1.4 For benzene by Procedure A, the following oxygenated fuels are included in the working range: (1) ethanol up to 20 % by volume (E20); (2) methanol up to 10 % by volume (M10). Fuels M85 and E85 were excluded.
1.5 For benzene by Procedure B the following oxygenated fuels are included in the working range: (1) ethanol up to 20 % by volume (E20); (2) methanol up to 10 % by volume (M10). Fuels M85 and E85 were excluded.
1.6 For toluene by Procedure A the following oxygenated fuels were included in the working range: (1) ethanol up to 20 % by volume (E20); (2) M85 and E85.
1.7 For toluene by Procedure B the following oxygenated fuels are included in the working range: (1) ethanol up to 20 % by volume (E20); (2) M85 and E85.
1.8 Procedure A uses MIBK as the internal standard. Procedure B uses sec-butanol as the internal standard. The use of Procedure B for fuels containing blended butanols requires that sec-butanol be below the detection limit in the fuels as sec-butanol is an internal standard. For Procedure B, an alternative separation column set described in the annex ( , Annex Approach B) uses MEK as the internal standard when butanols may be blended into gasolines.
1.9 This test method includes a relative bias section for benzene reporting based on Practice bias assessment between Test Method Procedure B and Test Method . It is intended to allow Test Method Procedure B to be used as a possible alternative to Test Method . The Practice derived benzene correlation equation is applicable for benzene measurements in the range from 0.04 % to 2.53 % by volume as reported by Test Method Procedure B. The correlation complies with EPA’s Performance Based Measurement System (PBMS).
1.10 Correlation equations are included in the relative bias section of Procedure A to convert Procedure A to the Procedure B volume percent values for benzene and toluene. The correlations are applicable in the concentration ranges of 0.07 % to 5.96 % by volume for benzene and 0.36 % to 20.64 % by volume for toluene as reported by Procedure A. The bias corrected Procedure A to Procedure B result may be correlated further to benzene obtained by as described in (2) of Procedure A and of Procedure B.
1.11 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.12 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.13 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D5769 Test Method for Determination of Benzene, Toluene, and Total Aromatics in Finished Gasolines by Gas Chromatography/Mass Spectrometry
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and Lubricants
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material
E288 Specification for Laboratory Glass Volumetric Flasks
E694 Specification for Laboratory Glass Volumetric Apparatus
E969 Specification for Glass Volumetric (Transfer) Pipets
E1044 Specification for Glass Serological Pipets (General Purpose and Kahn)
E1293 Specification for Glass Measuring Pipets
ICS Number Code 75.160.20 (Liquid fuels)
UNSPSC Code 15101504(Aviation fuel)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D3606-20e1, Standard Test Method for Determination of Benzene and Toluene in Spark Ignition Fuels by Gas Chromatography, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top