Designation:D8361−20StandardTestMethodforTotalOrganicCarboninWaterbyTwoStageWetChemicalCatalyzedHydroxylRadicalOxidationwithInfra-RedDetectionofResultingCarbonDioxide1ThisstandardisissuedunderthefixeddesignationD8361;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthecatalyzedhydroxylradicaloxidationsystemforthein-stream,online(GuideD5173)orlaboratoryanalysisoftotalorganiccarbon,totalcarbonandtotalinorganiccarbonindrinkingwater,wastewater,industrialprocesswater,andeffluentwater.Itisapplicabletobothdissolvedandsuspendedmaterials.Suspendedmaterialsandparticulatesupto2mmindiametercanbeanalyzed.1.2ThistestmethodallowsfordeterminationofTOC≥1mg/L,TC≥1mg/L,andTIC≥1mg/L.Thelowerandupperworkingrangesarerestrictedbyinstrument-dependentcondi-tions(forexample,samplevolume,amountofeachreactant)andcanbeadjustedforawiderrange.1.3Thistestmethodcanbeappliedforthedeterminationoftotalcarbon(TC)andtotalinorganiccarbon(TIC).Volatileorpurgeableorganiccarbon(VOC,POC)canbedeterminedseparatelybythistestmethod(seeAnnexA1).1.4Thistestmethodallowsthemeasurementoforganicandinorganiccarbonconcentrationsamples,andsamplescontain-ingdissolvedchloridesuptoseawaterchlorideconcentrations.1.5Thechemicaloxidationprocess,appliedinthistestmethod,takesplaceatambientpressureandtemperaturebyusinghydroxylradicals.Theadvantageofcatalytichydroxylradicaloxidationisthatitisfreefromseawatersalinityinterference.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspeci...
