ASTM_D_5769_-_15.pdf

Designation:D576915Standard Test Method forDetermination of Benzene,Toluene,and Total Aromatics inFinished Gasolines by Gas Chromatography/MassSpectrometry1This standard is issued under the fixed designation D5769;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.1.Scope*1.1 This test method covers the determination of benzene,toluene,other specified individual aromatic compounds,andtotal aromatics in finished motor gasoline,including gasolinescontainingoxygenatedblendingcomponents,bygaschromatography/mass spectrometry(GC/MS).1.2 This test method has been tested for the followingconcentration ranges,in liquid volume percent,for the follow-ing aromatics:benzene,0.1%to 4%;toluene,1%to 13%;and total(C6 to C12)aromatics,10%to 42%.The round-robin study did not test the method for individual hydrocarbonprocess streams in a refinery,such as reformates,fluid catalyticcracked naphthas,and so forth,used in the blending ofgasolines.1.3 Results are reported to the nearest 0.01%for benzeneand 0.1%for the other aromatics by liquid volume.1.4 This test method includes a relative bias section for EPAspark-ignition engine fuel benzene regulations reporting basedon Practice D6708 accuracy assessment between Test MethodD5769 and Test Method D3606 as a possible Test MethodD5769 alternative to Test Method D3606.The Practice D6708derived correlation equation is only applicable for blendedfuels in the benzene concentration range from 0.0%to 2.50%by volume as measured by Test Method D5769.The applicableTest Method D3606 range for benzene is from 0.0%to 2.47%by volume as reported by Test Method D3606.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 practices and determine the applica-bility of regulatory limitations prior to its use.2.Referenced Documents2.1 ASTM Standards:2D1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD3606 Test Method for Determination of Benzene andToluene in Finished Motor and Aviation Gasoline by GasChromatographyD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Material3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 aromaticany hydrocarbon compound containing abenzene or naphthalene ring.3.1.2 calibrated aromatic componentthe individual aro-matic components that have a specific calibration.3.1.3 cool on-column injectorin gas chromatography,adirect sample introduction system that is set at a temperature ator below the boiling point of solutes or solvent on injection andthen heated at a rate equal to or greater than the column.Normally used to eliminate boiling point discrimination oninjection or to reduce adsorption on glass liners withininjectors,or both.The sample is injected directly into the headof the capillary column tubing.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0M on Mass Spectroscopy.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 1995.Last previous edition approved in 2015 as D5769 10(2015).DOI:10.1520/D5769-15.2For referenced ASTM standards,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.*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 States1 3.1.4 open split interfaceGC/MS interface used to main-tain atmospheric pressure at capillary column outlet and toeliminate mass spectrometer vacuum effects on the capillarycolumn.Can be used to dilute the sample entering the massspectrometer to maintain response linearity.3.1.5 reconstructed ion chromatogram(RIC)a limitedmass chromatogram representing the intensities of ion massspectrometric currents for only those ions having particularmass to charge ratios.Used in this test method to selectivelyextract or identify aromatic components in the presence of acomplex hydrocarbon matrix