Designation:E2679−09StandardTestMethodforAcidityinMono-,Di-,Tri-andTetraethyleneGlycolbyNon-AqueousPotentiometricTitration1ThisstandardisissuedunderthefixeddesignationE2679;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftotalacidityasaceticacidincommonlyavailablegradesofmono-ethyleneglycol,diethyleneglycol,triethyleneglycolandtetraethyleneglycolusinganon-aqueouspotentiometrictitra-tion.Thistestmethodisusefulfordetermininglowlevelsofacidity,below200mg/kg.1.2Themono-,di-,tri-andtetraethyleneglycolscanbeanalyzeddirectlybythistestmethodwithoutanysamplepreparation.1.3ReviewthecurrentappropriateMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninthesectiononHazards,Section9.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterE180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)33.Terminology3.1Definitions:3.1.1acidity—theamountoftotalacidtitratedwithanaqueousbase(KOHorNaOH)inasampleofethyleneglycol.Theacidityiscalculatedasaceticacidinmg/kg.4.SummaryofTestMethod4.1Analiquotofamono-,di-,tri-ortetraethyleneglycolsampleisweighedandtitratedpotentiometricallywithamonotonicordynamicmodeoftitrantadditionusinganaqueousbase(NaOHorKOH)solutiontodeterminetheacidcontentinmilligramsofacidasaceticacidperkilogra...
