1、Designation:D518622Standard Test Method forDetermination of the Aromatic Content and PolynuclearAromatic Content of Diesel Fuels By Supercritical FluidChromatography1This standard is issued under the fixed designation D5186;the number immediately following the designation indicates the year oforigin
2、al 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.Scope*1.1 This test method covers the determination of the totalamounts of monoar
3、omatic and polynuclear aromatic hydrocar-bon compounds in motor diesel fuels and blend stocks bysupercritical fluid chromatography(SFC).The range of aro-matics concentration to which this test method is applicable isfrom 1%to 75%by mass.The range of polynuclear aromatichydrocarbon concentrations to
4、which this test method isapplicable is from 0.5%to 50%by mass.1.2 This test method includes relative bias for Test MethodD5186 versus Test Method D1319 and Test Method D6591versus Test Method D5186 for diesel fuels.The applicableranges of the correlation ranges are presented in the RelativeBias sect
5、ion.The correlations are applicable only in the statedranges and only to diesel fuels.1.3 This test method and correlations were developed fordiesel samples not containing biodiesel;the presence of bio-diesel will interfere with the results.The correlation equationsare only applicable between these
6、concentration ranges and todiesel fuels that do not contain biodiesel.1.4 The values stated in SI units are to be regarded asstandard.The values stated in inch-pound units are for infor-mation only.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use
7、.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on
8、 standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1319 Test Method for Hydrocarbon Types in L
9、iquid Petro-leum Products by Fluorescent Indicator AdsorptionD2425 Test Method for Hydrocarbon Types in Middle Dis-tillates by Mass SpectrometryD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6591 Test Meth
10、od for Determination of Aromatic Hydro-carbon Types in Middle DistillatesHigh PerformanceLiquid Chromatography Method with Refractive IndexDetectionD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Ma
11、terial3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 critical pressure,nthat pressure needed to condensea gas at the critical temperature.3.1.2 critical temperature,nthe highest temperature atwhich a gaseous fluid may be converted to a liquid by meansof compression.3.1.3 monon
12、uclear aromatic hydrocarbons,nhydrocarbon compounds containing exactly one aromaticring.This group includes benzene,alkyl-substituted benzenes,indans,tetralins,alkyl-substituted indans,and alkyl-substitutedtetralins.3.1.4 polynuclear aromatic hydrocarbons,nall hydrocar-bon compounds containing two o
13、r more aromatic rings.Theserings may be fused as in naphthalene and phenanthrene,orseparate as in biphenyl.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0C on Liquid Chromatogr
14、aphy.Current edition approved April 1,2022.Published May 2022.Originallyapproved in 1991.Last previous edition approved in 2020 as D5186 20.DOI:10.1520/D5186-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of AS
15、TMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was
16、developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.1.5 restrictor,na device,attached to the outlet of achromatographic column,to restrict the mobile phase flowsuch that the mobile phase is maintained in the supercriticalstate throughout the chromatographic column.3.
