Designation:D2180−89(Reapproved2008)StandardTestMethodforActiveOxygeninBleachingCompounds1ThisstandardisissuedunderthefixeddesignationD2180;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofinorganic“activeoxygen”inbleachingcompoundssuchasperborates,percarbonates,andperoxidesbutnotinpersulfatesormonop-ersulfates.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.MaterialSafetyDataSheetsareavailableforreagentsandmaterials.Reviewthemforhazardspriortousage.2.ReferencedDocuments2.1ASTMStandards:2D459TerminologyRelatingtoSoapsandOtherDetergentsD1193SpecificationforReagentWater3.Terminology3.1Definitions:3.1.1activeoxygen—themeasureoftheoxidizingpowerofcompoundssuchasinorganicperborates,percarbonates,orperoxideswhich,ineffect,releasehydrogenperoxideinacidsolutions.Itisexpressedintermsofoxygen(O)withgram-equivalentweightof8.00.4.SummaryofTestMethod4.1Activeoxygenisdeterminedbytitrationofanacidifiedaqueoussolutionofthecompoundwithastandardsolutionofpotassiumpermanganate.NOTE1—Useofamolybdate-catalyzediodometricmethodforthispurposehasbeensuggested,butthepossiblereactionoftheliberatediodineonorganicspresentmustbeconsidered.Itisbelievedthereislesslikelihoodofreactionwithpermanganate,providedthetitrationisperformedinsuchamannerastoavoidanyconsiderableexcessofpermanganate.5.Interferences5.1Thepossibilityofinterferencefromorganicconstituents,whichmayreactwithpermanganate,mustbeconsideredwitheachcompoundencountered.Asluggishreactionorvagueendpoint,willsuggestinterference.Inor-ganicbuildersordetergents,suchassilicates,phosphates,orcarbo...
