ASTM_D_6591_-_19.pdf

Designation:D659119Designation:548/06Standard Test Method forDetermination of Aromatic Hydrocarbon Types in MiddleDistillatesHigh Performance Liquid ChromatographyMethod with Refractive Index Detection1This standard is issued under the fixed designation D6591;the number immediately following the 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.INTRODUCTIONThis test method has the same title as IP 548-06 and is intended to be technically equivalent.TheASTM format for test methods has been used,and where possible,equivalent ASTM test methodshave replaced the IP or ISO standards.The test method is intended to be used as one of several possible alternative instrumental testmethods that are aimed at quantitative determination of hydrocarbon types in fuels.This does notimply that a correlation necessarily exists between this and any other test method intended to give thisinformation,and it is the responsibility of the user to determine such correlation if necessary.1.Scope*1.1 This test method covers a high performance liquidchromatographic test method for the determination of mono-aromatic,di-aromatic,tri+-aromatic,and polycyclic aromatichydrocarbon contents in diesel fuels and petroleum distillatesboiling in the range from 150 C to 400 C.The total aromaticcontent in%m/m is calculated from the sum of the corre-sponding individual aromatic hydrocarbon types.NOTE1Aviation fuels and petroleum distillates with a boiling pointrange from 50 C to 300 C are not determined by this test method andshould be analyzed by Test Method D6379 or other suitable equivalent testmethods.1.2 The precision of this test method has been establishedfor diesel fuels and their blending components,containingfrom 4%to 40%(m/m)mono-aromatic hydrocarbons,0%to20%(m/m)di-aromatic hydrocarbons,0%to 6%(m/m)tri+-aromatic hydrocarbons,0%to 26%(m/m)polycyclicaromatic hydrocarbons,and 4%to 65%(m m)total aromatichydrocarbons.1.3 Compounds containing sulfur,nitrogen,and oxygen arepossible interferents.Mono-alkenes do not interfere,but con-jugated di-and poly-alkenes,if present,are possible interfer-ents.1.4 By convention,this standard defines the aromatic hy-drocarbon types on the basis of their elution characteristicsfrom the specified liquid chromatography column relative tomodel aromatic compounds.Quantification is by externalcalibration using a single aromatic compound,which may ormay not be representative of the aromatics in the sample,foreach aromatic hydrocarbon type.Alternative techniques andmethods may classify and quantify individual aromatic hydro-carbon types differently.1.5 Fatty Acid Methyl Esters(FAME),if present,interferewith tri+-aromatic hydrocarbons.If this method is used fordiesel containing FAME,the amount of tri+-aromatics will beover estimated.1.6 This test method includes a Relative Bias section forTest Method D6591 versus Test Method D1319 and TestMethod D5186 versus Test Method D6591 for diesel fuelsonly.The applicable concentration ranges of the correlationsare presented in the Relative Bias section.The correlations areapplicable only in the stated ranges.1.7 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 concentration ranges and todiesel fuels that do not contain biodiesel.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 Chromatography.This test method is based on material published in IP Standard Methods forAnalysis and Testing of Petroleum and Related Products and British Standard 2000Parts,copyright The Institute of Petroleum,61 New Cavendish Street,LondonW1M 8AR.Adapted with permission of The Institute of Petroleum.Current edition approved June 1,2019.Published August 2019.Originallyapproved in 2000.Last previous edition approved in 2018 as D6591 18.DOI:10.1520/D6591-19.*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 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.1 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,health,and environmental practices and deter-mine the applicability of regulatory limitations