Designation:D3228−20StandardTestMethodforTotalNitrogeninLubricatingOilsandFuelOilsbyModifiedKjeldahlMethod1ThisstandardisissuedunderthefixeddesignationD3228;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofnitrogeninlubricatingoilswhenpresentintheconcentrationfrom0.03%to0.10%bymass,andforthedeterminationofnitrogeninfueloilswhenpresentintheconcentrationfrom0.015%to2.0%bymass.Thistestmethodisalsoapplicabletotheanalysisofadditiveconcentratesandadditivepackages.NOTE1—ThistestmethodmaynotbeapplicabletocertainmaterialscontainingN–OorN–Nlinkage.However,thesamplesusedinthecooperativeprogramtoestablishtheprecisionofthetestmethodwerecompoundedwithcurrentlyavailableashlessadditivescontainingnitro-gen.Completerecoveryofthenitrogenpresentintheseadditiveswasobtained.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,see6.6,6.9,and8.8.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechni...
