Designation:D8001−16´1StandardTestMethodforDeterminationofTotalNitrogen,TotalKjeldahlNitrogenbyCalculation,andTotalPhosphorusinWater,WastewaterbyIonChromatography1ThisstandardisissuedunderthefixeddesignationD8001;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialchangesweremadethroughoutinSeptember2016.1.Scope1.1Thistestmethodisapplicablefortheanalysistotalnitrogen(organicnitrogen+ammonia-N+nitrate-N+nitrite-N)asnitrateandtotalphosphorusasorthophosphateinunfilteredwatersamplesbyalkalinepersulfatedigestionfol-lowedbyionchromatography(IC).1.2TotalKjeldahlnitrogen(TKN)isdeterminedbythecalculation.TodetermineTKNsubtractthenitrate-Nandnitrite-Ninadigestedsamplefromanon-digestedsample(seeSection4,SummaryofTestMethod).1.3Thelimitofdetection(LOD),limitofquantitation(LOQ),andreportingrangeinTable1arebasedonthetwo-stepprocessforthistestmethod:digestionandanalyticalstep.Becausethedigestionsteprequiresasampledilution,theLODandLOQarehigherthanundigestedsamples.Thereportingrange,LOD,andLOQcanbemodifiedandperhapsimproveddependingonseveralfactors(seeSection6,Inter-ferences).1.4Themethoddetectionlimits(MDL)areshownforreference.Thedigestionreagentcontainsbackgroundnitrateandresultsinhigherdetectionlimits.MDLwillbeshownaftertheinterlaboratorystudy(ILS)iscompleted.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplica...
