ASTM D6550-20

Standard Test Method for Determination of Olefin Content of Gasolines by Supercritical-Fluid Chromatography

SIGNIFICANCE AND USE
5.1 Gasoline-range olefinic hydrocarbons have been demonstrated to contribute to photochemical reactions in the atmosphere, which result in the formation of photochemical smog in susceptible urban areas.  
5.2 The California Air Resources Board (CARB) has specified a maximum allowable limit of total olefins in motor gasoline. This necessitates an appropriate analytical test method for determination of total olefins to be used both by regulators and producers.  
5.3 This test method compares favorably with Test Method D1319 (FIA) for the determination of total olefins in motor gasolines. It does not require any sample preparation, has a comparatively short analysis time of about 10 min, and is readily automated. Alternative methods for determination of olefins in gasoline include Test Methods D6839 and D6296.
SCOPE
1.1 This test method covers the determination of the total amount of olefins in blended motor gasolines and gasoline blending stocks by supercritical-fluid chromatography (SFC). Results are expressed in terms of mass percent olefins. The method working range is from expected concentration of 1 % by mass to expected concentration of 25 % by mass total olefins.  
1.2 This test method can be used for analysis of commercial gasolines, including those containing varying levels of oxygenates, such as methyl tert/butyl ether (MTBE), diisopropyl ether (DIPE), methyl tert/amyl ether (TAME), and ethanol, without interference.
Note 1: This test method has not been designed for the determination of the total amounts of saturates, aromatics, and oxygenates.  
1.3 This test method includes a relative bias section based on Practice D6708 accuracy assessment between Test Method D6550 mass percent and Test Method D1319 volume percent for total olefins in spark-ignition engine fuels as a possible Test Method D6550 alternative to Test Method D1319 for U.S. EPA regulations reporting. The Practice D6708 derived correlation equation is only applicable for test result range from 0.53 % to 26.88 % by mass as reported by Test Method D6550.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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.

General Information

• Status: Published
• Publication Date: 30-Jun-2020
• ICS: 27.060.10 - Liquid and solid fuel burners
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.04.0C - Liquid Chromatography

Standards Content (Sample)

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.
Designation:D6550 −20
Standard Test Method for
Determination of Olefin Content of Gasolines by
1
Supercritical-Fluid Chromatography
This standard is issued under the fixed designation D6550; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This test method covers the determination of the total
Barriers to Trade (TBT) Committee.
amount of olefins in blended motor gasolines and gasoline
blending stocks by supercritical-fluid chromatography (SFC).
2. Referenced Documents
Results are expressed in terms of mass percent olefins. The
2
2.1 ASTM Standards:
method working range is from expected concentration of 1 %
D1319 Test Method for Hydrocarbon Types in Liquid Petro-
by mass to expected concentration of 25 % by mass total
leum Products by Fluorescent Indicator Adsorption
olefins.
D4052 Test Method for Density, Relative Density, and API
1.2 This test method can be used for analysis of commercial
Gravity of Liquids by Digital Density Meter
gasolines, including those containing varying levels of
D5186 Test Method for Determination of the Aromatic
oxygenates, such as methyl tert/butyl ether (MTBE), diisopro-
Content and Polynuclear Aromatic Content of Diesel
pyl ether (DIPE), methyl tert/amyl ether (TAME), and ethanol,
Fuels By Supercritical Fluid Chromatography
without interference.
D6296 Test Method for Total Olefins in Spark-ignition
NOTE 1—This test method has not been designed for the determination
Engine Fuels by Multidimensional Gas Chromatography
of the total amounts of saturates, aromatics, and oxygenates.
D6299 Practice for Applying Statistical Quality Assurance
and Control Charting Techniques to Evaluate Analytical
1.3 This test method includes a relative bias section based
Measurement System Performance
on Practice D6708 accuracy assessment between Test Method
D6300 Practice for Determination of Precision and Bias
D6550 mass percent and Test Method D1319 volume percent
Data for Use in Test Methods for Petroleum Products,
fortotalolefinsinspark-ignitionenginefuelsasapossibleTest
Liquid Fuels, and Lubricants
MethodD6550alternativetoTestMethodD1319forU.S.EPA
regulations reporting. The Practice D6708 derived correlation D6708 Practice for StatisticalAssessment and Improvement
of Expected Agreement Between Two Test Methods that
equation is only applicable for test result range from 0.53 % to
26.88 % by mass as reported by Test Method D6550. Purport to Measure the Same Property of a Material
D6839 Test Method for Hydrocarbon Types, Oxygenated
1.4 The values stated in SI units are to be regarded as
Compounds, and Benzene in Spark Ignition Engine Fuels
standard. No other units of measurement are included in this
by Gas Chromatography
standard.
1.5 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.1.1 critical pressure, n—the pressure needed to condense
priate safety, health, and environmental practices and deter-
a gas to a liquid at the critical temperature.
mine the applicability of regulatory limitations prior to use.
3.1.2 critical temperature, n—the highest temperature at
1.6 This international standard was developed in accor-
which a gaseous fluid can be condensed to a liquid by means
dance with internationally recognized principles on standard-
of compression.
ization established in the Decision on Principles for the
3.1.3 supercritical fluid, n—a fluid maintained above its
critical temperature and critical pressure.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
2
Subcommittee D02.04.0C on Liquid Chromatography. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
CurrenteditionapprovedJuly1,2020.PublishedJuly2020.Originallyapproved contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in 2000. Last previous edition approved in 2015 as D6550 – 15. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D6550-20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6550 − 15 D6550 − 20
Standard Test Method for
Determination of Olefin Content of Gasolines by
1
Supercritical-Fluid Chromatography
This standard is issued under the fixed designation D6550; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the determination of the total amount of olefins in blended motor gasolines and gasoline blending
stocks by supercritical-fluid chromatography (SFC). Results are expressed in terms of mass %percent olefins. The application
method working range is from 1 mass % to 25 mass % expected concentration of 1 % by mass to expected concentration of 25 %
by mass total olefins.
1.2 This test method can be used for analysis of commercial gasolines, including those containing varying levels of oxygenates,
such as methyl tert/butyl ether (MTBE), diisopropyl ether (DIPE), methyl tert/amyl ether (TAME), and ethanol, without
interference.
NOTE 1—This test method has not been designed for the determination of the total amounts of saturates, aromatics, and oxygenates.
1.3 This test method includes a relative bias section based on Practice D6708 accuracy assessment between Test Method D6550
mass percent and Test Method D1319 volume percent for total olefins in spark-ignition engine fuels as a possible Test Method
D6550 alternative to Test Method D1319 for U.S. EPA regulations reporting. The Practice D6708 derived correlation equation is
only applicable for fuels in the concentration test result range from 0.20.53 % to 26.226.88 % by mass as reported by Test Method
D6550. The applicable Test Method D1319 concentration range for total olefins is 0.2 % to 27.7 % by volume as reported by Test
Method D1319.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 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
2
2.1 ASTM Standards:
D1319 Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
D5186 Test Method for Determination of the Aromatic Content and Polynuclear Aromatic Content of Diesel Fuels By
Supercritical Fluid Chromatography
D6296 Test Method for Total Olefins in Spark-ignition Engine Fuels by Multidimensional Gas Chromatography
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measure-
ment System Performance
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and
Lubricants
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.04.0C on Liquid Chromatography.
Current edition approved Dec. 1, 2015July 1, 2020. Published December 2015July 2020. Originally approved in 2000. Last previous edition approved in 2015 as
D6550 – 10 (2015).D6550 – 15. DOI: 10.1520/D6550-15.10.1520/D6550-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D6550 − 20
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport
to Measure the Sa
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