Designation:D1721–97(Reapproved2007)StandardTestMethodforPermanganateTimeofTricresylPhosphate1ThisstandardisissuedunderthefixeddesignationD1721;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedetectionintricresylphos-phateofthepresenceofimpuritiesthatreducepotassiumpermanganate.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection6.1.4Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWater3.SignificanceandUse3.1Impuritiessuchasphenols,ifpresentintricresylphos-phate,willreactwithpotassiumpermanganate,reducingittomanganesedioxide.Inthepermanganatetest,thecolorofthetestsolutionisobservedattheendofa30-minperiod,andifthepinkcolorisstillpresent,thesampleisconsideredsubstantiallyfreeofoxidizableimpurities.3.2Theresultsofthismeasurementcanbeusedforspeci-ficationacceptance.4.Apparatus4.1GraduatedCylinders,glass-stoppered,100-mLcapac-ity.5.Reagents5.1PurityofReagents—Reagentgradechemicalsshallbeusedinalltests.Unlessotherwiseindicated,itisintendedthatallreagentsshallconformtothespecificationsoftheCommit-teeonAnalyticalReagentsoftheAmericanChemicalSociety,wheresuchspecificationsareavailable.3Othergradesmaybeused,provideditisfirstascertainedthatthereagentisofsufficientlyhighpuritytopermititsusewithoutlesseningtheaccuracyofthedetermination.5.2PurityofWater—Unlessotherwiseindicated,referencestowatershallbeunderstoodtomeanreag...
