Designation:D4377−00(Reapproved2011)ManualofPetroleumMeasurementStandards(MPMS),Chapter10.7Designation:356/99StandardTestMethodforWaterinCrudeOilsbyPotentiometricKarlFischerTitration1ThisstandardisissuedunderthefixeddesignationD4377;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofwaterintherangefrom0.02to2%incrudeoils.Mercaptanandsulfide(S−orH2S)sulfurareknowntointerferewiththistestmethod(seeSection5).1.2ThistestmethodisintendedforusewithstandardKarlFischerreagentorpyridine-freeKarlFischerreagents.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection7.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD4006TestMethodforWaterinCrudeOilbyDistillationD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsE203TestMethodforWaterUsingVolumetricKarlFischerTitration2.2APIStandards:3MPMSChapter8.1ManualSamplingofPetroleumandPetroleumProducts(ASTMPracticeD4057)MPMSChapter8.2AutomaticSamplingofPetroleumandPetroleumProducts(ASTMPracticeD4177)MPMSChapter10.2DeterminationofWaterinCrudeOilbyDistillation(ASTMTestMethodD4006)3.SummaryofTestMethod3.1Afterhomogenizingthecrudeoilwithamixer,analiquotofthecrude,inamixedsolvent,istitratedtoanelectrometricend-pointusingKarlFischerreagent.4.SignificanceandUse4.1Aknowledgeofthewatercontent...
