Designation:D1839−14StandardTestMethodforAmylNitrateinDieselFuels1ThisstandardisissuedunderthefixeddesignationD1839;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationof0.1to0.5volume%amylnitrateindieselfuels.NOTE1—Thistestmethodhasbeenusedforthedeterminationofhexylnitrateindieselfuels,buthasnotbeencooperativelytestedforsuchsamples.Forthedeterminationofhexylnitrate,usestandardscontainingnitrateestersofprimaryhexanol.Useadensityof0.97incalculatingresults.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD4057PracticeforManualSamplingofPetroleumandPetroleumProducts3.SummaryofTestMethod3.1Thistestmethodisbasedonthesimultaneoushydroly-sisoftheesterin62.5%sulfuricacidandnitrationofm-xylenolbythenitricacidliberated.Thenitroxylenolisdistilledfromthereactionmixtureandreactedwithsodiumhydroxidetoformtheyellowsodiumsalt.Residualdieselfuelisremovedbyetherextraction.Thecolorismeasuredspectro-photometricallyat452nm,andtheconcentrationofamylnitrateisdeterminedbyreferencetoastandardcurve.4.SignificanceandUse4.1Indieselfuel,thepresenceofalkylnitratessuchasamylnitrate,hexylnitrate,oroctylnitratecausesahigherresiduevaluethanobservedinuntreatedfuel,whichcanleadtoerroneousconclusionsastothecokeformingpropensityofthefuel.Thepresenceofsuchalkylnitrateinthefuelcanbedeterminedusingthistestmethod.Thistestmethodcanbeusedtodeterminetheamountofamylnitratethathasbeenaddedtodieself...
