Designation:D1093−11StandardTestMethodforAcidityofHydrocarbonLiquidsandTheirDistillationResidues1ThisstandardisissuedunderthefixeddesignationD1093;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thistestmethodcoversthequalitativedeterminationoftheacidityofhydrocarbonliquidsandtheirdistillationresi-dues.(Warning—Manyhydrocarbonliquidsareextremelyflammable.Harmfulifinhaled.Hydrocarbonliquidvaporscancauseaflashfire.)1.2Ifdesiredtodeterminethebasicityofahydrocarbonliquid,proceedinaccordancewith9.2or9.3,butsubstitute3dropsofphenolphthaleinindicatorsolutionforthemethylorangeindicator.Apinkorredcolorintheaqueoussolutionwhenphenolphthaleinisusedindicatesbasicity.1.3Theresultsobtainedbythistestmethodarequalitativeexpressions.However,forthepreparationofreagentsandintheprocedure,acceptableSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D86TestMethodforDistillationofPetroleumProductsatAtmosphericPressureD91TestMethodforPrecipitationNumberofLubricatingOilsD850TestMethodforDistillationofIndustrialAromaticHydrocarbonsandRelatedMaterialsD1078TestMethodforDistillationRangeofVolatileOr-ganicLiquidsD1193SpecificationforReagentWaterD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProducts3.Terminology3.1Definitions:3.1.1acidity,n—thequality,stateordegreeofbeingacid.3.1.1.1Discussion—Inthistestmethod,thecriterionforacidityisapinkorredcolorwhenmethylorangeindicatorisu...
