Designation:D4808−01(Reapproved2012)StandardTestMethodsforHydrogenContentofLightDistillates,MiddleDistillates,GasOils,andResiduabyLow-ResolutionNuclearMagneticResonanceSpectroscopy1ThisstandardisissuedunderthefixeddesignationD4808;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thesetestmethodscoverthedeterminationofthehydrogencontentofpetroleumproductsrangingfromatmo-sphericdistillatestovacuumresiduausingacontinuouswave,low-resolutionnuclearmagneticresonancespectrometer.(TestMethodD3701isthepreferredmethodfordeterminingthehydrogencontentofaviationturbinefuelsusingnuclearmagneticresonancespectroscopy.)1.2Threetestmethodsareincludedherethataccountforthespecialcharacteristicsofdifferentpetroleumproductsandapplytothefollowingdistillationranges:TestMethodPetroleumProductsBoilingRange,°C(°F)(approximate)ALightDistillates15–260(60–500)BMiddleDistillates200–370(400–700)GasOils370–510(700–950)CResidua510+(950+)1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thepreferredunitsaremass%.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSections6.2and6.4.2.ReferencedDocuments2.1ASTMStandards:2D3701TestMethodforHydrogenContentofAviationTurbineFuelsbyLowResolutionNuclearMagneticResonanceSpectrometryD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD5291TestMethodsforInstrumentalDeterminationofCarbon,Hydrogen,andNitrogeninPetroleumProductsandLubricants3.SummaryofTestMethods3.1Atestspecimeniscompared...
