ASTM D6730-2001(2011) 5000 Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100&0150 Metre Capillary (with Precolumn) High-Resoluti.pdf
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1、Designation: D6730 01 (Reapproved 2011)Standard Test Method forDetermination of Individual Components in Spark IgnitionEngine Fuels by 100Metre Capillary (with Precolumn) High-Resolution Gas Chromatography1This standard is issued under the fixed designation D6730; the number immediately following th
2、e designation 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers
3、the 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
4、blending 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 from 0.0
5、1 to approximately 30 mass %. The test methodmay be applicable to higher and lower concentrations for theindividual components; however, the user must verify theaccuracy if the test method is used for components withconcentrations outside the specified ranges.1.3 This test method also determines met
6、hanol, ethanol,t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether(ETBE), and t-amyl methyl ether (TAME) in spark ignitionengine fuels in the concentration range from 1 to 30 mass %.However, the cooperative study data provided insufficientstatistical data for obtaining a precision statement
7、for thesecompounds.1.4 Although a majority of the individual 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 enc
8、ountereddue to co-elution and a lack of identification of all componentspresent. Samples containing significant amounts of naphthenic(for example, virgin naphthas) constituents above n-octanemay reflect significant errors in PONA-type groupings. Basedon the gasoline samples in the interlaboratory co
9、operativestudy, this test method is applicable to samples containing lessthan 25 mass % of olefins. However, some interfering co-elution with the olefins above C7is possible, particularly ifblending components or their higher boiling cuts such as thosederived from fluid catalytic cracking (FCC) are
10、analyzed, andthe total olefin content may not be accurate. Annex A1 of thistest method compares results of the test method with other testmethods for selected components, including olefins, and sev-eral group types for several interlaboratory cooperative studysamples. Although benzene, toulene, and
11、several oxygenatesare determined, when doubtful as to the analytical results ofthese components, confirmatory analyses can be obtained byusing the specific test methods listed in the reference section.1.4.1 Total olefins in the samples may be obtained orconfirmed, or both, if necessary, by Test Meth
12、od D1319(volume %) or other test methods, such as those based onmultidimentional PONA-type of instruments.1.5 If water is or is suspected of being present, its concen-tration may be determined, if desired, by the use of TestMethod D1744 or equivalent. Other compounds containingoxygen, sulfur, nitrog
13、en, 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 these specific materials be used, such as TestMethods D4815 and D5599 for oxygenates, and Test MethodD5623 for sulfur compound
14、s, or equivalent.1.6 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.7 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
15、to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1319 Test Method for Hydrocarbon Types in Liquid1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Prod
16、ucts and Lubricants and is the direct responsibility of SubcommitteeD02.04.0L on Gas Chromatography Methods.Current edition approved May 1, 2011. Published May 2011. Originallyapproved in 2001. Last previous edition approved in 2006 as D6730 01(2006)1.DOI: 10.1520/D6730-01R11.2For referenced ASTM st
17、andards, visit the ASTM website, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken
18、, PA 19428-2959, United States.Petroleum Products by Fluorescent Indicator AdsorptionD1744 Test Method for Determination of Water in LiquidPetroleum Products by Karl Fischer Reagent3D3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD4057 Practice for Manual Sampling of Petrol
19、eum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD4626 Practice for Calculation of Gas ChromatographicResponse FactorsD4815 Test Method for Determination of MTBE, ETBE,TAME,
20、DIPE, tertiary-Amyl Alcohol and C1to C4Alco-hols in Gasoline by Gas ChromatographyD5580 Test Method for Determination of Benzene, Tolu-ene, Ethylbenzene, p/m-Xylene, o-Xylene, C9and HeavierAromatics, and Total Aromatics in Finished Gasoline byGas ChromatographyD5599 Test Method for Determination of
21、Oxygenates inGasoline by Gas Chromatography and Oxygen SelectiveFlame Ionization DetectionD5623 Test Method for Sulfur Compounds in Light Petro-leum Liquids by Gas Chromatography and Sulfur Selec-tive DetectionE355 Practice for Gas Chromatography Terms and Rela-tionshipsE594 Practice for Testing Fla
22、me Ionization Detectors Usedin Gas or Supercritical Fluid ChromatographyE1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas Chromatographs3. Terminology3.1 DefinitionsThis test method makes reference to manycommon gas chromatographic procedures, terms, and relation-ships.
23、 Detailed definitions can be found in Practice E355.4. Summary of Test Method4.1 A representative sample of the petroleum liquid isintroduced into a gas chromatograph equipped with an opentubular (capillary) column coated with a methyl silicone liquidphase, modified with a capillary precolumn. Heliu
24、m carrier gastransports the vaporized sample through the column, in whichit is partitioned into individual components which are sensedwith a flame ionization detector as they elute from the end ofthe column. The detector signal is presented on a strip chartrecorder or digitally, or both, by way of a
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