Designation:D1832–87(Reapproved1999)AnAmericanNationalStandardTechnicalAssociationofPulpandPaperIndustryStandardMethodT659su-67StandardTestMethodforPeroxideNumberofPetroleumWax1ThisstandardisissuedunderthefixeddesignationD1832;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheperox-idenumberofpetroleumwax.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definition:2.1.1peroxidenumber—themilliequivalentsofconstituentsper1000gofwaxthatwilloxidizepotassiumiodide.3.SummaryofTestMethod3.1Aquantityofsampleisdissolvedincarbontetrachlorideandacidifiedwithaceticacidsolution.Asolutionofpotassiumiodideisaddedand,afterareactionperiod,thesolutionistitratedwithsodiumthiosulfatesolutiontotheendpointindicatedbythecolorchangeofaddedstarchsolution.4.SignificanceandUse4.1Themagnitudeoftheperoxidenumberisanindicationofthequantityofoxidizingconstituentspresent.Deteriorationofpetroleumwaxresultsintheformationofperoxidesandotheroxygen-carryingcompounds.Theperoxidenumbermea-suresthosecompoundsthatwilloxidizepotassiumiodide.5.Apparatus5.1IodineFlask,borosilicateglass,250-mLcapacity,glass-stoppered.6.ReagentsandMaterials6.1PurityofReagents—Reagentgradechemicalsshallbeusedinalltests.Unlessotherwiseindicated,itisintendedthatallreagentsshallconformtothespecificationsoftheCommit-teeonAnalyticalReagentsoftheAmericanChemicalSociety,wheresuchspecificationsareavailable.2Othergradesmaybeused,provideditisfirstascertainedthatthereagentisofsufficientlyhighpuritytopermititsusewithoutlesseningtheaccuracyofthedetermination.6.2PurityofWater—Un...
