Designation:E1584−11StandardTestMethodforAssayofNitricAcid1ThisstandardisissuedunderthefixeddesignationE1584;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversdeterminationoftheassayofnitricacidbytotalacidity.Thistestmethodissuitableforconcentrationsbetweenapproximately50and70%,calculatedasnitricacid.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection8.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterE180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)3E200PracticeforPreparation,Standardization,andStorageofStandardandReagentSolutionsforChemicalAnalysisE300PracticeforSamplingIndustrialChemicals3.SummaryofTestMethod3.1Aweighedsampleofacidisdilutedinwaterandtitratedwith1.0Nsodiumhydroxidesolution,usingphenolphthaleinastheend-pointindicator.4.SignificanceandUse4.1Thistestmethodprovidesameansforassayingnitricacid,basedontotalacidity.Theconcentrationofnitricacidisimportantinmanyoftheusesofnitricacid,includingspecificationcomplianceandmanufacturingcontrol.5.Interferences5.1Acidsotherthannitric,andcompoundsthatconsumesodiumhydroxide,willyielderroneouslyhighresults.6.Apparatus6.1ErlenmeyerFlask,250mL,glassstoppered.6.2Buret,50mL,ClassA.NOTE1—Adigitalburetcapableofmeasuringvolumestot...
