Designation:D7795−15(Reapproved2022)´1StandardTestMethodforAcidityinEthanolandEthanolBlendsbyTitration1ThisstandardisissuedunderthefixeddesignationD7795;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallyupdatedreferencesinSection3and19.2inMay2022.1.Scope1.1Thistestmethodcoversthedeterminationofacidityasaceticacid(seeSpecificationD4806)incommonlyavailablegradesofdenaturedethanol,andethanolblendswithgasolinerangingfromE95toE30.Thistestmethodisusedfordetermininglowlevelsofacidity,below200mg⁄kg(ppmmass),withtheexclusionofcarbondioxide.1.1.1ProcedureA—Developedspecificallyformeasure-mentofaciditybypotentiometrictitration.Thisistherefereemethod.1.1.2ProcedureB—Developedspecificallyformeasure-mentofaciditybycolorendpointtitration.1.2Theethanolandethanolblendsmaybeanalyzeddi-rectlybythistestmethodwithoutanysamplepreparation.1.3ReviewthecurrentandappropriateMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautionsandproperpersonalprotectiveequipments.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.SomespecifichazardsstatementsaregiveninSection7onHazards.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D770Specificat...
