Designation:D7963−14StandardTestMethodforDeterminationofContaminationLevelofFattyAcidMethylEstersinMiddleDistillateandResidualFuelsUsingFlowAnalysisbyFourierTransformInfraredSpectroscopy—RapidScreeningMethod1ThisstandardisissuedunderthefixeddesignationD7963;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodspecifiesarapidscreeningmethodusingflowanalysisbyFourierTransformInfrared(FA-FTIR)spectroscopywithpartialleastsquares(PLS)processingforthequantitativedeterminationofthefattyacidmethylester(FAME)contaminationofmiddledistillates,intherangeof20mg⁄kgto1000mg⁄kg,andofmiddledistillatesandresidualfuels,followingdilution,forlevelsabove0.1%.NOTE1—AnnexA2describesadilutionproceduretosignificantlyexpandthemeasurementrangeabove1000mg/kgfordistillatesandtoenablemeasurementofresidualoilsNOTE2—ThistestmethoddetectsallFAMEcomponents,withpeakIRabsorbanceatapproximately1749cm-1andC8toC22molecules,asspecifiedinstandardssuchasD6751andEN14214.TheaccuracyofthetestmethodisbasedonthemolecularmassofC16toC18FAMEspecies;thepresenceofotherFAMEspecieswithdifferentmolecularmassescouldaffecttheaccuracy.NOTE3—Additivessuchasantistaticagents,antioxidants,andcorro-sioninhibitorsaremeasuredwiththeFAMEbytheFTIRspectrometer.Howeveranypotentialinterferenceeffectsoftheseadditivesareelimi-natedbytheflowanalysisprocessing.NOTE4—Precisionformiddledistillateandresidualfuelisprovidedinpreliminaryformatthistime,detailsaregiveninAppendixX1.NOTE5—ThescopeofthistestmethoddoesnotincludeaviationturbinefuelwhichisaddressedbyTestMethodD7797.1.2AllstatedvaluesareinSIunits.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityo...
