ASTM D6729-2004 Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100 Meter Capillary High Resolution Gas Chromatography《用100米毛细管高分辨.pdf
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1、Designation: D 6729 04An American National StandardStandard Test Method forDetermination of Individual Components in Spark IgnitionEngine Fuels by 100 Metre Capillary High Resolution GasChromatography1This standard is issued under the fixed designation D 6729; the number immediately following the de
2、signation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers th
3、e determination of individualhydrocarbon components of spark-ignition engine fuels andtheir mixtures containing oxygenate blends (MTBE, ETBE,ethanol, and so forth) with boiling ranges up to 225C. Otherlight liquid hydrocarbon mixtures typically encountered inpetroleum refining operations, such as bl
4、ending stocks (naph-thas, reformates, alkylates, and so forth) may also be analyzed;however, statistical data was obtained only with blendedspark-ignition engine fuels.1.2 Based on the cooperative study results, individual com-ponent concentrations and precision are determined in therange of 0.01 to
5、 approximately 30 mass %. The procedure maybe applicable to higher and lower concentrations for theindividual components; however, the user must verify theaccuracy if the procedure is used for components with concen-trations outside the specified ranges.1.3 The test method also determines methanol,
6、ethanol,t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether(ETBE), t-amyl methyl ether (TAME) in spark ignition enginefuels in the concentration range of 1 to 30 mass %. However,the cooperative study data provided sufficient statistical datafor MTBE only.1.4 Although a majority of the indivi
7、dual hydrocarbonspresent are determined, some co-elution of compounds isencountered. If this test method is utilized to estimate bulkhydrocarbon group-type composition (PONA) the user of suchdata should be cautioned that some error will be encountereddue to co-elution and a lack of identification of
8、 all componentspresent. Samples containing significant amounts of olefinic ornaphthenic (for example, virgin naphthas), or both, constitu-ents above n-octane may reflect significant errors in PONAtype groupings. Based on the gasoline samples in the inter-laboratory cooperative study, this procedure
9、is applicable tosamples containing less than 25 mass % of olefins. However,some interfering coelution with the olefins above C7is pos-sible, particularly if blending components or their higherboiling cuts such as those derived from fluid catalytic cracking(FCC) are analyzed, and the total olefin con
10、tent may not beaccurate.1.4.1 Total olefins in the samples may be obtained orconfirmed, or both, if necessary, by Test Method D 1319(volume %) or other test methods, such as those based onmultidimensional PONA type of instruments.1.5 If water is or is suspected of being present, its concen-tration m
11、ay be determined, if desired, by the use of TestMethod D 1744, or equivalent. Other compounds containingoxygen, sulfur, nitrogen, and so forth, may also be present, andmay co-elute with the hydrocarbons. If determination of thesespecific compounds is required, it is recommended that testmethods for
12、these specific materials be used, such as TestMethods D 4815 and D 5599 for oxygenates, and D 5623 forsulfur compounds, or equivalent.1.6 Annex A1 of this test method compares results of thetest procedure with other test methods for selected compo-nents, including olefins, and several group types fo
13、r severalinterlaboratory cooperative study samples. Although benzene,toluene, and several oxygenates are determined, when doubtfulas to the analytical results of these components, confirmatoryanalyses can be obtained by using specific test methods.1.7 The values stated in SI units are to be regarded
14、 as thestandard. The values given in parentheses are provided forinformation purposes only.1.8 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practi
15、ces and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1319 Test Method for Hydrocarbon Types in LiquidPetroleum Products by Fluorescent Indicator Adsorption1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum
16、 Products and Lubricants and is the direct responsibility of SubcommitteeD02.04 on Hydrocarbon Analysis.Current edition approved Nov. 1, 2004. Published November 2004. Originallyapproved in 2001. Last previous edition approved in 2001 as D 672901.2For referenced ASTM standards, visit the ASTM websit
17、e, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor D
18、rive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 1744 Test Method for Determination of Water in LiquidPetroleum Products by Karl Fisher Reagent3D 4815 Test Method for Determination of MTBE, ETBE,TAME, DIPE, t-Amyl Alcohol and C1to C4Alcohols inGasoline by Gas ChromatographyD 5599
19、 Test Method for Determination of Oxygenates inGasoline by Gas Chromatography and Oxygen SelectiveFlame Ionization DetectionD 5623 Test Method for Sulfur Compounds in Light Petro-leum Liquids by Gas Chromatography and Sulfur Selec-tive DetectionE 355 Practice for Gas Chromatography Terms and Rela-ti
20、onships3. Terminology3.1 DefinitionsThis test method makes reference to manycommon gas chromatographic procedures, terms, and relation-ships. Detailed definitions can be found in Practice E 355.4. Summary of Test Method4.1 Representative samples of the petroleum liquid areintroduced into a gas chrom
21、atograph equipped with an opentubular (capillary) column coated with the specified stationaryphase. Helium carrier gas transports the vaporized samplethrough the column, in which it is partitioned into individualcomponents which are sensed with a flame ionization detectoras they elute from the end o
22、f the column. The detector signalis recorded digitally by way of an integrator or integratingcomputer. Each eluting component is identified by comparingits retention time to that established by analyzing referencestandards or samples under identical conditions. The concen-tration of each component i
23、n mass % is determined bynormalization of the peak areas after correction of selectedcomponents with detector response factors. The unknowncomponents are reported individually and as a summary total.5. Significance and Use5.1 Knowledge of the specified individual component com-position (speciation)
24、of gasoline fuels and blending stocks isuseful for refinery quality control and product specification.Process control and product specification compliance for manyindividual hydrocarbons may be determined through the use ofthis test method.6. Apparatus6.1 Gas Chromatograph, a gas chromatograph equip
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