ASTM D6730-22

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: D6730 − 22
Standard Test Method for
Determination of Individual Components in Spark Ignition
Engine Fuels by 100-Metre Capillary (with Precolumn) High-
1
Resolution Gas Chromatography
This standard is issued under the fixed designation D6730; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* on the gasoline samples in the interlaboratory cooperative
study, this test method is applicable to samples containing less
1.1 This test method covers the determination of individual
than 25% by mass of olefins. However, some interfering
hydrocarbon components of spark-ignition engine fuels and
co-elution with the olefins above C is possible, particularly if
their mixtures containing oxygenate blends (MTBE, ETBE, 7
blending components or their higher boiling cuts such as those
ethanol, and so forth) with boiling ranges up to 225°C. Other
derived from fluid catalytic cracking (FCC) are analyzed, and
light liquid hydrocarbon mixtures typically encountered in
the total olefin content may not be accurate. AnnexA1 of this
petroleum refining operations, such as blending stocks
(naphthas, reformates, alkylates, and so forth) may also be test method compares results of the test method with other test
analyzed; however, statistical data was obtained only with
methods for selected components, including olefins, and sev-
blended spark-ignition engine fuels.
eral group types for several interlaboratory cooperative study
samples. Although benzene, toulene, and several oxygenates
1.2 Based on the cooperative study results, individual com-
are determined, when doubtful as to the analytical results of
ponent concentrations and precision are determined in the
these components, confirmatory analyses can be obtained by
range from 0.01% to approximately 30% by mass. The test
method may be applicable to higher and lower concentrations using the specific test methods listed in the reference section.
for the individual components; however, the user must verify
1.4.1 Total olefins in the samples may be obtained or
the accuracy if the test method is used for components with
confirmed, or both, if necessary, by Test Method D1319
concentrations outside the specified ranges.
(percentbyvolume)orothertestmethods,suchasthosebased
1.3 This test method also determines methanol, ethanol, on multidimentional PONA-type of instruments.
t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether
1.5 If water is or is suspected of being present, its concen-
(ETBE), and t-amyl methyl ether (TAME) in spark ignition
tration may be determined, if desired, by the use of Test
engine fuels in the concentration range from 1% to 30% by
Method D1744 or equivalent. Other compounds containing
mass. However, the cooperative study data provided insuffi-
oxygen,sulfur,nitrogen,andsoforth,mayalsobepresent,and
cient statistical data for obtaining a precision statement for
may co-elute with the hydrocarbons. If determination of these
these compounds.
specific compounds is required, it is recommended that test
1.4 Although a majority of the individual hydrocarbons
methods for these specific materials be used, such as Test
present are determined, some co-elution of compounds is
Methods D4815 and D5599 for oxygenates, and Test Method
encountered. If this test method is utilized to estimate bulk
D5623 for sulfur compounds, or equivalent.
hydrocarbongroup-typecomposition(PONA),theuserofsuch
data should be cautioned that some error will be encountered
1.6 The values stated in SI units are to be regarded as
duetoco-elutionandalackofidentificationofallcomponents
standard. No other units of measurement are included in this
present. Samples containing significant amounts of naphthenic
standard.
(for example, virgin naphthas) constituents above n-octane
1.7 This standard does not purport to address all of the
may reflect significant errors in PONA-type groupings. Based
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1
This test method is under the jurisdiction of ASTM Committee D02 on
mine the applicability of regulatory limitations prior to use.
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.04.0L on Gas Chromatography Methods.
1.8 This international standard was developed in accor-
Current edition approved Nov. 1, 2022. Published
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