Designation:D2973−10´1StandardTestMethodforTotalNitrogeninPeatMaterials1ThisstandardisissuedunderthefixeddesignationD2973;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.´1NOTE—EditoriallycorrectedthejurisdictioninMarch2011.1.Scope*1.1Thistestmethodcoversachemicaltestmethod2forthedeterminationoftheweightpercentofnitrogeninpeatmaterial.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(SeePracticeD3740)2.ReferencedDocuments2.1ASTMStandards:3D653TerminologyRelatingtoSoil,Rock,andContainedFluidsD1193SpecificationforReagentWaterD2974TestMethodsforMoisture,Ash,andOrganicMatterofPeatandOtherOrganicSoilsD3740PracticeforMinimumRequirementsforAgenciesEngagedinTestingand/orInspectionofSoilandRockasUsedinEngineeringDesignandConstructionD4753GuideforEvaluating,Selecting,andSpecifyingBal-ancesandStandardMassesforUseinSoil,Rock,andConstructionMaterialsTestingD6026PracticeforUsingSignificantDigitsinGeotechnicalDataE145SpecificationforGravity-ConvectionandForced-VentilationOvens3.Terminology3.1Definitions:3.1.1Forcommondefinitionsoftermsinthisstandard,refertoTerminologyD653.4.SummaryofTestMethod4.1Inthisprocedure,thenitrogenisconvertedintoammo-niumsaltsbydestructivedigestionofthesamplewithahot,catalyzedmixtureofconcentratedsulfuricacidandpotassiumsulfate.Thesesaltsaresubsequentlydecomposedinahotalkalinesolutionfromwhichtheammoniaisrecoveredbydistillationandfinallydeterminedbyacidimetrictitration.5.SignificanceandUse5.1Nitrogencontentisimportantasitisoneoftheprimaryplantfoodelemen...
