Designation:D3867−16(Reapproved2021)´1StandardTestMethodsforNitrite-NitrateinWater1ThisstandardisissuedunderthefixeddesignationD3867;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—TheWTOcaveatwaseditoriallyaddedandwarningnoteswereeditoriallyupdatedthroughoutinNovember2021.1.Scope1.1Thesetestmethodscoverthedeterminationofnitritenitrogen,nitratenitrogen,andcombinednitrite-nitratenitrogeninwaterandwastewaterintherangefrom0.05to1.0mg/Lnitrogen.Twotestmethods2aregivenasfollows:SectionsTestMethodA—AutomatedCadmiumReduction9to18TestMethodB—ManualCadmiumReduction19to281.2Thesetestmethodsareapplicabletosurface,saline,waste,andgroundwaters.Itistheuser’sresponsibilitytoensurethevalidityofthesetestmethodsforwatersofuntestedmatrices.1.3ThevaluesstatedineitherSIorinch-poundunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,see8.2.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D992MethodofTestforNitrateIoninWater(Withdrawn1983)4D1129TerminologyRelatingtoWaterD1141PracticeforPreparationofSubstituteOceanWaterD1193SpecificationforReagentWaterD1254MethodofTestforNitriteIoninWater(Withdrawn1980)4D2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19...
