Designation:D2191−22StandardTestMethodforAcetaldehydeContentofVinylAcetate1ThisstandardisissuedunderthefixeddesignationD2191;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftracequantitiesofacetaldehyde,intherangefrom0.00to0.05%,containedin99%gradevinylacetate.1.2Forpurposesofdeterminingconformanceofanob-servedoracalculatedvalueusingthistestmethodtorelevantspecifications,testresult(s)shallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.ForspecifichazardstatementsseeSection8.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications3.SummaryofTestMethod3.1Theacetaldehydepresentinthespecimenisreactedwithameasuredexcessofsodiumbisulfite.Theamountofsodiumbisulfiteconsumed,determinedbytitratingtheexcesswithastandardiodinesolution,isameasureoftheacetalde-hydepresentinthevinylacetate.4.SignificanceandUse4.1Thistestm...
