ASTM_D_7806_-_20.pdf

Designation:D780620Standard Test Method forDetermination of Biodiesel(Fatty Acid Methyl Ester)andTriglyceride Content in Diesel Fuel Oil Using Mid-InfraredSpectroscopy(FTIR Transmission Method)1This standard is issued under the fixed designation D7806;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 fatty acidmethyl ester(FAME)biodiesel and triglyceride(TAG)concen-trations in traditional diesel and renewable diesel fuel blendsusing a portable mid-infrared spectrometer.1.2 The method applies to samples with biodiesel concen-trations from 3%to 40%by volume.Additionally,it appliesto samples with biodiesel concentrations from 2%to 27%byvolume which contain triglycerides concentrations from 1%to10%by volume.Triglycerides from 2%to 10%by volumecan be determined in samples of diesel having biodieselconcentrations from 3%to 27%by volume.FAME andtriglyceride can be simultaneously determined outside thesestated ranges,but the stated precision estimates do not apply.1.3 The method is not able to distinguish TAG and FAME ifthe TAG concentrations is below 0.142 the measured FAMEconcentrations.1.4 This procedure is not appropriate for the determinationof the concentration of biodiesel in the form of fatty acid ethylesters(FAEE),see Section 6 for further discussion of possibleinterferences.1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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:2D975 Specification for Diesel FuelD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1655 Specification for Aviation Turbine FuelsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and Petroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products,Liquid Fuels,and LubricantsD6751 Specification for Biodiesel Fuel Blend Stock(B100)for Middle Distillate FuelsD7418 Practice for Set-Up and Operation of Fourier Trans-form Infrared(FT-IR)Spectrometers for In-Service OilCondition MonitoringE131 Terminology Relating to Molecular SpectroscopyE168 Practices for General Techniques of Infrared Quanti-tative AnalysisE1655 Practices for Infrared Multivariate QuantitativeAnalysis1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0F on Absorption Spectroscopic Methods.Current edition approved July 15,2020.Published August 2020.Originallyapproved in 2012.Last previous edition approved in 2012 as D7806 12.DOI:10.1520/D7806-20.2For 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.E2056 Practice for Qualifying Spectrometers and Spectro-photometers for Use in Multivariate Analyses,CalibratedUsing Surrogate Mixtures3.Terminology3.1 Definitions:3.1.1 biodiesel,na fuel composed of mono-alkyl esters oflong chain fatty acids