ASTM D6729-04(2009)
(Test Method)Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100 Metre Capillary High Resolution Gas Chromatography
Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100 Metre Capillary High Resolution Gas Chromatography
SIGNIFICANCE AND USE
Knowledge of the specified individual component composition (speciation) of gasoline fuels and blending stocks is useful for refinery quality control and product specification. Process control and product specification compliance for many individual hydrocarbons may be determined through the use of this test method.
SCOPE
1.1 This test method covers the determination of individual hydrocarbon components of spark-ignition engine fuels and their mixtures containing oxygenate blends (MTBE, ETBE, ethanol, and so forth) with boiling ranges up to 225°C. Other light liquid hydrocarbon mixtures typically encountered in petroleum refining operations, such as blending stocks (naphthas, reformates, alkylates, and so forth) may also be analyzed; however, statistical data was obtained only with blended spark-ignition engine fuels.
1.2 Based on the cooperative study results, individual component concentrations and precision are determined in the range of 0.01 to approximately 30 mass %. The procedure may be applicable to higher and lower concentrations for the individual components; however, the user must verify the accuracy if the procedure is used for components with concentrations outside the specified ranges.
1.3 The test method also determines methanol, ethanol, t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether (ETBE), t-amyl methyl ether (TAME) in spark ignition engine fuels in the concentration range of 1 to 30 mass %. However, the cooperative study data provided sufficient statistical data for MTBE only.
1.4 Although a majority of the individual hydrocarbons present are determined, some co-elution of compounds is encountered. If this test method is utilized to estimate bulk hydrocarbon group-type composition (PONA) the user of such data should be cautioned that some error will be encountered due to co-elution and a lack of identification of all components present. Samples containing significant amounts of olefinic or naphthenic (for example, virgin naphthas), or both, constituents above n-octane may reflect significant errors in PONA type groupings. Based on the gasoline samples in the interlaboratory cooperative study, this procedure is applicable to samples containing less than 25 mass % of olefins. However, some interfering coelution with the olefins above C7 is possible, particularly if blending components or their higher boiling cuts such as those derived from fluid catalytic cracking (FCC) are analyzed, and the total olefin content may not be accurate.
1.4.1 Total olefins in the samples may be obtained or confirmed, or both, if necessary, by Test Method D 1319 (volume %) or other test methods, such as those based on multidimensional PONA type of instruments.
1.5 If water is or is suspected of being present, its concentration may be determined, if desired, by the use of Test Method D 1744, or equivalent. Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute with the hydrocarbons. If determination of these specific compounds is required, it is recommended that test methods for these specific materials be used, such as Test Methods D 4815 and D 5599 for oxygenates, and D 5623 for sulfur compounds, or equivalent.
1.6 Annex A1 of this test method compares results of the test procedure with other test methods for selected components, including olefins, and several group types for several interlaboratory cooperative study samples. Although benzene, toluene, and several oxygenates are determined, when doubtful as to the analytical results of these components, confirmatory analyses can be obtained by using specific test methods.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
1.8 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 sta...
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Designation: D6729 − 04(Reapproved 2009)
Standard Test Method for
Determination of Individual Components in Spark Ignition
Engine Fuels by 100 Metre Capillary High Resolution Gas
1
Chromatography
This standard is issued under the fixed designation D6729; 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 naphthenic (for example, virgin naphthas), or both, constitu-
ents above n-octane may reflect significant errors in PONA
1.1 This test method covers the determination of individual
type groupings. Based on the gasoline samples in the inter-
hydrocarbon components of spark-ignition engine fuels and
laboratory cooperative study, this procedure is applicable to
their mixtures containing oxygenate blends (MTBE, ETBE,
samples containing less than 25 mass % of olefins. However,
ethanol, and so forth) with boiling ranges up to 225°C. Other
some interfering coelution with the olefins above C is
7
light liquid hydrocarbon mixtures typically encountered in
possible, particularly if blending components or their higher
petroleum refining operations, such as blending stocks
boiling cuts such as those derived from fluid catalytic cracking
(naphthas, reformates, alkylates, and so forth) may also be
(FCC) are analyzed, and the total olefin content may not be
analyzed; however, statistical data was obtained only with
accurate.
blended spark-ignition engine fuels.
1.4.1 Total olefins in the samples may be obtained or
1.2 Based on the cooperative study results, individual com-
confirmed, or both, if necessary, by Test Method D1319
ponent concentrations and precision are determined in the
(volume %) or other test methods, such as those based on
range of 0.01 to approximately 30 mass %.The procedure may
multidimensional PONA type of instruments.
be applicable to higher and lower concentrations for the
1.5 If water is or is suspected of being present, its concen-
individual components; however, the user must verify the
tration may be determined, if desired, by the use of Test
accuracy if the procedure is used for components with concen-
Method D1744, or equivalent. Other compounds containing
trations outside the specified ranges.
oxygen, sulfur, nitrogen, and so forth, may also be present, and
1.3 The test method also determines methanol, ethanol,
may co-elute with the hydrocarbons. If determination of these
t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether
specific compounds is required, it is recommended that test
(ETBE), t-amyl methyl ether (TAME) in spark ignition engine
methods for these specific materials be used, such as Test
fuels in the concentration range of 1 to 30 mass %. However,
Methods D4815 and D5599 for oxygenates, and D5623 for
the cooperative study data provided sufficient statistical data
sulfur compounds, or equivalent.
for MTBE only.
1.6 Annex A1 of this test method compares results of the
1.4 Although a majority of the individual hydrocarbons
test procedure with other test methods for selected
present are determined, some co-elution of compounds is
components, including olefins, and several group types for
encountered. If this test method is utilized to estimate bulk
several interlaboratory cooperative study samples. Although
hydrocarbon group-type composition (PONA) the user of such
benzene,toluene,andseveraloxygenatesaredetermined,when
data should be cautioned that some error will be encountered
doubtful as to the analytical results of these components,
due to co-elution and a lack of identification of all components
confirmatory analyses can be obtained by using specific test
present. Samples containing significant amounts of olefinic or
methods.
1.7 The values stated in SI units are to be regarded as the
1
This test method is under the jurisdiction of ASTM Committee D02 on
standard. The values given in parentheses are provided for
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.04.0L on Gas Chromatography Methods. information purposes only.
Current edition approved April 15, 2009. Published July 2009. Originally
´1 1.8 This standard does not purport to address all of the
approved in 2001. Last previous edition approved in 2004 as D6729–04 . DOI:
safety concerns, if any, associated with its use. It is the
10.1520/D6729-04R09.
*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 ----------------------
D6729 − 04 (2009)
responsibility of the user of this standard to establish appro- 6. Apparatus
p
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
Designation:D6729–01 Designation: D 6729 – 04 (Reapproved 2009)
Standard Test Method for
Determination of Individual Components in Spark Ignition
Engine Fuels by 100 MeterMetre Capillary High Resolution
1
Gas Chromatography
This standard is issued under the fixed designation D 6729; 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 individual hydrocarbon components of spark-ignition engine fuels and their
mixtures containing oxygenate blends (MTBE, ETBE, ethanol, and so forth) with boiling ranges up to 225°C. Other light liquid
hydrocarbon mixtures typically encountered in petroleum refining operations, such as blending stocks (naphthas, reformates,
alkylates, and so forth) may also be analyzed; however, statistical data was obtained only with blended spark-ignition engine fuels.
1.2 Based on the cooperative study results, individual component concentrations and precision are determined in the range of
0.01 to approximately 30 mass %. The procedure may be applicable to higher and lower concentrations for the individual
components; however, the user must verify the accuracy if the procedure is used for components with concentrations outside the
specified ranges.
1.3 The test method also determines methanol, ethanol, t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether (ETBE),
t-amyl methyl ether (TAME) in spark ignition engine fuels in the concentration range of 1 to 30 mass %. However, the cooperative
study data provided sufficient statistical data for MTBE only.
1.4 Although a majority of the individual hydrocarbons present are determined, some co-elution of compounds is encountered.
If this test method is utilized to estimate bulk hydrocarbon group-type composition (PONA) the user of such data should be
cautioned that some error will be encountered due to co-elution and a lack of identification of all components present. Samples
containing significant amounts of olefinic or naphthenic (for example, virgin naphthas), or both, constituents above n-octane may
reflect significant errors in PONA type groupings. Based on the gasoline samples in the interlaboratory cooperative study, this
procedure is applicable to samples containing less than 25 mass % of olefins. However, some interfering coelution with the olefins
above C is possible, particularly if blending components or their higher boiling cuts such as those derived from fluid catalytic
7
cracking (FCC) are analyzed, and the total olefin content may not be accurate.
1.4.1 Total olefins in the samples may be obtained or confirmed, or both, if necessary, by Test Method D 1319 (volume %) or
other test methods, such as those based on multidimensional PONA type of instruments.
1.5 If water is or is suspected of being present, its concentration may be determined, if desired, by the use of Test Method
D 1744, or equivalent. Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute
with the hydrocarbons. If determination of these specific compounds is required, it is recommended that test methods for these
specific materials be used, such as Test Methods D 4815 and D 5599 for oxygenates, and D 5623 for sulfur compounds, or
equivalent.
1.6 Annex A1 of this test method compares results of the test procedure with other test methods for selected components,
including olefins, and several group types for several interlaboratory cooperative study samples. Although benzene, toluene, and
several oxygenates are determined, when doubtful as to the analytical results of these components, confirmatory analyses can be
obtained by using specific test methods.
1.7 ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformation
purposes only.
1.8 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.
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.04.0L
on Gas Chromatographic Methods.
Current edition approved
...
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