Designation:D7795−12StandardTestMethodforAcidityinEthanolandEthanolBlendsbyTitration1ThisstandardisissuedunderthefixeddesignationD7795;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofacidityasaceticacid(seeSpecificationD4806)incommonlyavailablegradesofdenaturedethanol,andethanolblendswithgasolinerangingfromE95toE30.Thistestmethodisusedfordetermininglowlevelsofacidity,below200mg/kg(ppmmass),withtheexclusionofcarbondioxide.1.1.1TestMethodA—Developedspecificallyformeasure-mentofaciditybypotentiometrictitration.Thisistherefereemethod.1.1.2TestMethodB—Developedspecificallyformeasure-mentofaciditybycolorendpointtitration.1.2Theethanolandethanolblendsmaybeanalyzeddi-rectlybythistestmethodwithoutanysamplepreparation.1.3ReviewthecurrentandappropriateMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautionsandproperpersonalprotectiveequipments.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SomespecifichazardsstatementsaregiveninSection7onHazards.2.ReferencedDocuments2.1ASTMStandards:2D770SpecificationforIsopropylAlcoholD1193SpecificationforReagentWaterD4175TerminologyRelatingtoPetroleum,PetroleumProducts,andLubricantsD4806SpecificationforDenaturedFuelEthanolforBlend-ingwithGasolinesforUseasAutomotiveSpark-IgnitionEngineFuelD6300PracticeforDeterminationofPrecisionandBiasDataforUseinTestMethodsforPetroleumProductsandLubricantsE200PracticeforPreparation,Standardization,andSto...
