ASTM D6733-01(2006)
(Test Method)Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 50-Metre Capillary High Resolution Gas Chromatography
Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 50-Metre Capillary High Resolution Gas Chromatography
SIGNIFICANCE AND USE
Knowledge of the 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 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. The tables in enumerate the components reported. Component concentrations are determined in the range from 0.10 to 15 mass %. The procedure may be applicable to higher and lower concentrations for the individual components; however, the user must verify the accuracy if the procedures are used for components with concentrations outside the specified ranges.
1.2 This test method is applicable also to spark-ignition engine fuel blends containing oxygenated components. However, in this case, the oxygenate content must be determined by Test Methods D 5599 or D 4815.
1.3 Benzene co-elutes with 1-methylcyclopentene. Benzene content must be determined by Test Method D 3606 or D 5580.
1.4 Toluene co-elutes with 2,3,3-trimethylpentane. Toluene content must be determined by Test Method D 3606 or D 5580.
1.5 Although a majority of the individual hydrocarbons present are determined, some co-elution of compounds is encountered. If this procedure is utilized to estimate bulk hydrocarbon group-type composition (PONA) the user of such data should be cautioned that error may be encountered due to co-elution and a lack of identification of all components present. Samples containing significant amounts of naphthenic (for example, virgin naphthas) constituents above n-octane may reflect significant errors in PONA type groupings. Based on the interlaboratory cooperative study, this procedure is applicable to samples having concentrations of olefins less than 20 mass %. However, significant 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. Many of the olefins in spark ignition fuels are at a concentration below 0.10 %; they are not reported by this test method and may bias the total olefin results low.
1.5.1 Total olefins in the samples may be obtained or confirmed, or both, by Test Method D 1319 (volume %) or other test methods, such as those based on multidimensional PONA type of instruments.
1.6 If water is or is suspected of being present, its concentration may be determined, if desired, by the use of Test Method D 1744. Other compounds containing 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 Method D 5623 for sulfur compounds.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
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.
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Standards Content (Sample)
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Designation:D6733–01 (Reapproved 2006)
Standard Test Method for
Determination of Individual Components in Spark Ignition
Engine Fuels by 50-Metre Capillary High Resolution Gas
1
Chromatography
This standard is issued under the fixed designation D6733; 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 olefins above C is possible, particularly if blending compo-
7
nents or their higher boiling cuts such as those derived from
1.1 This test method covers the determination of individual
fluid catalytic cracking (FCC) are analyzed, and the total olefin
hydrocarbon components of spark-ignition engine fuels with
content may not be accurate. Many of the olefins in spark
boiling ranges up to 225°C. Other light liquid hydrocarbon
ignition fuels are at a concentration below 0.10 %; they are not
mixtures typically encountered in petroleum refining opera-
reported by this test method and may bias the total olefin
tions,suchas,blendingstocks(naphthas,reformates,alkylates,
results low.
and so forth) may also be analyzed; however, statistical data
1.5.1 Total olefins in the samples may be obtained or
was obtained only with blended spark-ignition engine fuels.
confirmed, or both, by Test Method D1319 (volume %) or
The tables in Annex A1 enumerate the components reported.
other test methods, such as those based on multidimensional
Component concentrations are determined in the range from
PONA type of instruments.
0.10 to 15 mass %. The procedure may be applicable to higher
1.6 If water is or is suspected of being present, its concen-
and lower concentrations for the individual components; how-
tration may be determined, if desired, by the use of Test
ever, the user must verify the accuracy if the procedures are
Method D1744. Other compounds containing sulfur, nitrogen,
used for components with concentrations outside the specified
and so forth, may also be present, and may co-elute with the
ranges.
hydrocarbons. If determination of these specific compounds is
1.2 This test method is applicable also to spark-ignition
required, it is recommended that test methods for these specific
engine fuel blends containing oxygenated components. How-
materials be used, such as Test Method D5623 for sulfur
ever, in this case, the oxygenate content must be determined by
compounds.
Test Methods D5599 or D4815.
1.7 The values stated in SI units are to be regarded as the
1.3 Benzene co-elutes with 1-methylcyclopentene. Benzene
standard. The values given in parentheses are provided for
content must be determined by Test Method D3606 or D5580.
information only.
1.4 Toluene co-elutes with 2,3,3-trimethylpentane. Toluene
1.8 This standard does not purport to address all of the
content must be determined by Test Method D3606 or D5580.
safety concerns, if any, associated with its use. It is the
1.5 Although a majority of the individual hydrocarbons
responsibility of the user of this standard to establish appro-
present are determined, some co-elution of compounds is
priate safety and health practices and determine the applica-
encountered. If this procedure is utilized to estimate bulk
bility of regulatory limitations prior to use.
hydrocarbon group-type composition (PONA) the user of such
data should be cautioned that error may be encountered due to
2. Referenced Documents
co-elution and a lack of identification of all components
2
2.1 ASTM Standards:
present. Samples containing significant amounts of naphthenic
D1319 Test Method for Hydrocarbon Types in Liquid
(for example, virgin naphthas) constituents above n-octane
Petroleum Products by Fluorescent Indicator Adsorption
may reflect significant errors in PONA type groupings. Based
D1744 Test Method for Determination of Water in Liquid
on the interlaboratory cooperative study, this procedure is
3
Petroleum Products by Karl Fischer Reagent
applicabletosampleshavingconcentrationsofolefinslessthan
D3606 Test Method for Determination of Benzene and
20 mass %. However, significant interfering coelution with the
Toluene in Finished Motor and Aviation Gasoline by Gas
Chromatography
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
2
D02.04.0L on Gas Chromatography Methods.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2006. Published January 2007. Originally
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2001 as D6733 – 01. DOI:
Standards volume information, refer to th
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