Designation:D6304−20StandardTestMethodforDeterminationofWaterinPetroleumProducts,LubricatingOils,andAdditivesbyCoulometricKarlFischerTitration1ThisstandardisissuedunderthefixeddesignationD6304;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedirectdeterminationofentrainedwaterinpetroleumproductsandhydrocarbonsusingautomatedinstrumentation.ThistestmethodalsocoverstheindirectanalysisofwaterthermallyremovedfromsamplesandsweptwithdryinertgasintotheKarlFischertitrationcell.Mercaptan,sulfide(S–orH2S),sulfur,andothercompoundsareknowntointerferewiththistestmethod(seeSection6).Theprecisionstatementofthismethodcoversthenominalrangeof20mg⁄kgto25000mg/kgforProcedureA,30mg⁄kgto2100mg⁄kgforProcedureB,and20mg⁄kgto360mg⁄kgforProcedureC.1.2ThistestmethodisintendedforusewithcommerciallyavailablecoulometricKarlFischerreagentsandforthedeter-minationofwaterinadditives,lubeoils,baseoils,automatictransmissionfluids,hydrocarbonsolvents,andotherpetroleumproducts.Byproperchoiceofthesamplesize,thistestmethodmaybeusedforthedeterminationofwaterfrommg/kgtopercentlevelconcentrations.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganization...
