Designation:E1784−08StandardTestMethodforTotalPeroxidesinAcrylonitrile1ThisstandardisissuedunderthefixeddesignationE1784;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethoddescribesaprocedurefordeterminingthetotalperoxidecontentofacrylonitrileintherangeof0.1to0.6mgH2O2/kgacrylonitrile(ppm).Peroxidesareanundesir-ableimpurityinacrylonitrile.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection7.1.4ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterE60PracticeforAnalysisofMetals,Ores,andRelatedMaterialsbySpectrophotometryE180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)3E200PracticeforPreparation,Standardization,andStorageofStandardandReagentSolutionsforChemicalAnalysis3.SummaryofTestMethod3.1PeroxidesinthesamplereactwithpotassiumiodidetoformtheyellowI3ion.Theintensityofthecolor,whichisproportionaltotheconcentrationoftheI3ion,ismeasuredat365nm.ResultsareexpressedastotalperoxidesasH2O2.4.SignificanceandUse4.1Thistestmethodprovidesforthedeterminationoftotalperoxideinacrylonitrileintherangeof0.1to0.6ppm.Onlyperoxidesorotheroxidantsthatreactundertheconditionsofthistestmethodaremeasured.5.Apparatus5.1Spectrophotometer,capableofmeasuringat365nm,5.2AbsorptionCells,1-cm,borosilicate,matched,and5.3Buret,...
