ASTM_D_2425_-_19.pdf

Designation:D242519Standard Test Method forHydrocarbon Types in Middle Distillates by MassSpectrometry1This standard is issued under the fixed designation D2425;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 an analytical scheme using themass spectrometer to determine the hydrocarbon types presentin conventional and synthesized hydrocarbons that have aboiling range of 160 C to 343 C(320 F to 650 F),5%to95%by volume as determined by Test Method D86.Sampleswith average carbon number value of paraffins between C12and C16and containing paraffins from C10and C18can beanalyzed.This test method is intended for use with full boilingrange products that contain no significant olefin content.Eleven hydrocarbon types are determined.These include:paraffins,noncondensedcycloparaffins,condenseddicycloparaffins,condensed tricycloparaffins,alkylbenzenes,indans or tetralins,or both,CnH2n-10(indenes,etc.),naphthalenes,CnH2n-14(acenaphthenes,etc.),CnH2n-16(acenaphthylenes,etc.),and tricyclic aromatics.NOTE1This test method was developed on Consolidated Electrody-namics Corporation Type 103 Mass Spectrometers.Operating parametersfor users with a Quadrupole Mass Spectrometer are provided.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 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 prior to use.For a specific warning statement,see 11.1.1.4 This international standard was developed in accor-dance with internationally recognized principles on 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:2D86 Test Method for Distillation of Petroleum Products andLiquid Fuels at Atmospheric PressureD1319 Test Method for Hydrocarbon Types in Liquid Petro-leum Products by Fluorescent Indicator AdsorptionD2549 Test Method for Separation of Representative Aro-matics and Nonaromatics Fractions of High-Boiling Oilsby Elution ChromatographyD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD6379 Test Method for Determination of Aromatic Hydro-carbonTypesinAviationFuelsandPetroleumDistillatesHigh Performance Liquid ChromatographyMethod with Refractive Index Detection3.Terminology3.1 Definitions:3.1.1 conventional hydrocarbons,nhydrocarbons derivedfrom the following conventional sources:crude oil,natural gasliquid condensates,heavy oil,shale oil,and oil sands.3.1.2 synthesized hydrocarbons,nhydrocarbons derivedfrom alternative sources such as coal,natural gas,biomass,andhydrogenated fats and oils by processes such as gasification,Fischer-Tropsch synthesis,and hydroprocessing.4.Summary of Test Method4.1 Samples are separated into saturate and aromatic frac-tions by liquid chromatography,and each fraction is analyzedby mass spectrometry.The analysis is based on the summationof characteristic mass fragments to determine the concentrationof hydrocarbon types.4.2 The summation of characteristic mass fragments aredefined as follows:71(paraffins)=total peak height of m/e+71+85.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricantsand is the direct responsibility ofSubcommittee D02.04.0M on Mass Spectroscopy.Current edition approved Jan.15,2019.Published February 2019.Originallyapproved in 1965.Last previous edition approved in 2017 as D2425 17.DOI:10.1520/D2425-19.2For 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 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 67(mono or noncondensed polycycloparaffins,orboth)=total peak height of m/e+67+68+69+81+82+83+96+97.123(condensed dicycloparaffins)