ASTM D7796-21
(Test Method)Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography
Standard Test Method for Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas Chromatography
SIGNIFICANCE AND USE
5.1 The presence of impurities in ETBE product can have a deleterious effect upon the value of ETBE as a fuel additive. Oxygenate and olefin contents are of primary concern. This test method provides a knowledge of the composition of ETBE product. This is useful in the evaluation of process operations control, in the valuation of the product, and for regulatory purposes.
SCOPE
1.1 This test method covers the determination of the purity of ethyl tert-butyl ether (ETBE) by gas chromatography. It also provides a procedure to measure impurities in ETBE such as C4 to C12 olefins, methyl, isopropyl and tert-butyl alcohols, methyl sec-butyl and methyl tert-amyl ethers, acetone, and methyl ethyl ketone.
1.2 This test method is not applicable to the determination of ETBE in gasoline.
1.3 Water cannot be determined by this test method and shall be measured by a procedure such as Test Method D6304 and the result used to normalize the chromatographic values.
1.4 Most of the impurities in ETBE are resolved by the test method, however, some co-elution is encountered.
1.5 This test method is inappropriate for impurities that boil at temperatures higher than 180 °C or for impurities that cause poor or no response in a flame ionization detector, such as water.
1.6 The values stated in SI units of measurement are preferred and used throughout the standard. Alternate units, in common usage, are also provided to improve clarity and aid the user of this test method.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 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
Buy Standard
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: D7796 − 21
Standard Test Method for
Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas
1
Chromatography
This standard is issued under the fixed designation D7796; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the determination of the purity
ofethyl tert-butylether(ETBE)bygaschromatography.Italso D3700 Practice for Obtaining LPG Samples Using a Float-
ing Piston Cylinder
provides a procedure to measure impurities in ETBE such as
C to C olefins, methyl, isopropyl and tert-butyl alcohols, D4057 Practice for Manual Sampling of Petroleum and
4 12
Petroleum Products
methyl sec-butyl and methyl tert-amyl ethers, acetone, and
methyl ethyl ketone. D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
1.2 This test method is not applicable to the determination
D4307 Practice for Preparation of Liquid Blends for Use as
of ETBE in gasoline.
Analytical Standards
1.3 Water cannot be determined by this test method and
D4626 Practice for Calculation of Gas Chromatographic
shall be measured by a procedure such as Test Method D6304
Response Factors
and the result used to normalize the chromatographic values.
D6304 Test Method for Determination of Water in Petro-
leum Products, Lubricating Oils, and Additives by Cou-
1.4 Most of the impurities in ETBE are resolved by the test
lometric Karl Fischer Titration
method, however, some co-elution is encountered.
D7618 Specification for Ethyl Tertiary-Butyl Ether (ETBE)
1.5 This test method is inappropriate for impurities that boil
for Blending with Aviation Spark-Ignition Engine Fuel
at temperatures higher than 180 °C or for impurities that cause
E355 Practice for Gas Chromatography Terms and Relation-
poor or no response in a flame ionization detector, such as
ships
water.
E594 Practice for Testing Flame Ionization Detectors Used
1.6 The values stated in SI units of measurement are in Gas or Supercritical Fluid Chromatography
preferred and used throughout the standard. Alternate units, in
3. Terminology
commonusage,arealsoprovidedtoimproveclarityandaidthe
user of this test method.
3.1 Definitions—This test method makes reference to many
1.7 This standard does not purport to address all of the common and gas chromatographic procedures, terms, and
safety concerns, if any, associated with its use. It is the relationships. Detailed definitions of these can be found in
responsibility of the user of this standard to establish appro- Practices E355 and E594, and Terminology D4175.
priate safety, health, and environmental practices and deter-
3.2 Definitions of Terms Specific to This Standard:
mine the applicability of regulatory limitations prior to use.
3.2.1 C to C olefins, n—common olefin impurities in
4 12
1.8 This international standard was developed in accor-
ETBE including unreacted feedstock and dimers or trimers of
dance with internationally recognized principles on standard-
feed such as trimethylpentene or pentamethylheptene.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Summary of Test Method
mendations issued by the World Trade Organization Technical
4.1 Arepresentative aliquot of the ETBE product sample is
Barriers to Trade (TBT) Committee.
introduced into a gas chromatograph equipped with a methyl
silicon bonded phase fused silica open tubular column. Helium
carrier gas transports the vaporized aliquot through the column
1
This test method is under the jurisdiction of ASTM Committee D02 on
where the components are separated by the chromatographic
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.04.0L on Gas Chromatography Methods.
Current edition approved Dec. 1, 2021. Published December 2021. Originally
2
approved in 2012. Last previous edition approved in 2017 as D7796 – 17. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/D7796-21. contact ASTM Customer Service at service@astm.org.
*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
---------------------- Page: 1 ----------------------
D7796 − 21
process. Components are sensed by a flame ionization detector pressure of approximately 550 kPa (80 psig) is re
...
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: D7796 − 17 D7796 − 21
Standard Test Method for
Analysis of Ethyl tert-Butyl Ether (ETBE) by Gas
1
Chromatography
This standard is issued under the fixed designation D7796; 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 purity of ethyl tert-butyl ether (ETBE) by gas chromatography. It also
provides a procedure to measure impurities in ETBE such as C to C olefins, methyl, isopropyl and tert-butyl alcohols, methyl
4 12
sec-butyl and methyl tert-amyl ethers, acetone, and methyl ethyl ketone.
1.2 This test method is not applicable to the determination of ETBE in gasoline.
1.3 Water cannot be determined by this test method and shall be measured by a procedure such as Test Method D6304 and the
result used to normalize the chromatographic values.
1.4 Most of the impurities in ETBE are resolved by the test method, however, some co-elution is encountered.
1.5 This test method is inappropriate for impurities that boil at temperatures higher than 180 °C or for impurities that cause poor
or no response in a flame ionization detector, such as water.
1.6 The values stated in SI units of measurement are preferred and used throughout the standard. Alternate units, in common
usage, are also provided to improve clarity and aid the user of this test method.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.8 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:
D3700 Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4175 Terminology Relating to 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
D02.04.0L on Gas Chromatography Methods.
Current edition approved Oct. 1, 2017Dec. 1, 2021. Published November 2017December 2021. Originally approved in 2012. Last previous edition approved in 20122017
as D7796 – 12.D7796 – 17. DOI: 10.1520/D7796-17.10.1520/D7796-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org.
*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
---------------------- Page: 1 ----------------------
D7796 − 21
D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards
D4626 Practice for Calculation of Gas Chromatographic Response Factors
D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl
Fischer Titration
D7618 Specification for Ethyl Tertiary-Butyl Ether (ETBE) for Blending with Aviation Spark-Ignition Engine Fuel
E355 Practice for Gas Chromatography Terms and Relationships
E594 Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography
3. Terminology
3.1 Definitions—This test method makes reference to many common and gas chromatographic procedures, terms, and
relationships. Detailed definitions of these can be found in Practices E355 and E594, and Terminology D4175.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 C to C olefins, n—common olefin impurities in ETBE including unreacted feedstock and dimers or trimers of feed such
4 12
as trimethylpentene or pentamethylheptene.
4. Summary of Test Method
4.1 A representative aliquot of the ETBE product sample is introduced into a gas chromatograph equipped with a methyl silicon
bonded phase fused silica open tubular column. Helium carrier gas transports the vaporized aliq
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.