Designation:D7371−14StandardTestMethodforDeterminationofBiodiesel(FattyAcidMethylEsters)ContentinDieselFuelOilUsingMidInfraredSpectroscopy(FTIR-ATR-PLSMethod)1ThisstandardisissuedunderthefixeddesignationD7371;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthecontentoffattyacidmethylesters(FAME)biodieselindieselfueloils.Itisapplicabletoconcentrationsfrom1.00to20volume%(seeNote1).ThisprocedureisapplicableonlytoFAME.Biodieselintheformoffattyacidethylesters(FAEE)willcauseanegativebias.NOTE1—UsingtheproperATRsampleaccessory,therangemaybeexpandedfrom1to100volume%,howeverprecisiondataisnotavailableabove20volume%.1.2ThevaluesstatedinSIunitsofmeasurementaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D975SpecificationforDieselFuelOilsD976TestMethodforCalculatedCetaneIndexofDistillateFuelsD1298TestMethodforDensity,RelativeDensity,orAPIGravityofCrudePetroleumandLiquidPetroleumProd-uctsbyHydrometerMethodD4052TestMethodforDensity,RelativeDensity,andAPIGravityofLiquidsbyDigitalDensityMeterD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsD4307PracticeforPreparationofLiquidBlendsforUseasAnalyticalStandardsD4737TestMethodforCalculatedCetaneIndexbyFourVariableEquationD5854PracticeforMixingandHandlingofLiquidSamplesofPetroleumandPetroleumProductsD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMea...
