Designation:D4183-824TbAMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceSt.,Philadelphia,Pa.19103ReprintedfromtheAnnualBookofASTMStandards,CopyrightASTMIfnotlistedinthecurrentcombinedindex,willappearinthenextedition.StandardTestMefhodsforTOTALRECOVERABLEPHOSPHORUSANDORGANICPHOSPHORUSINSEDIMENTS'TbissfandardisissuedundertheftxeddesignationD4183;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,intheweofrevision,theyearoflastrevision.AnumberinparenthesesindicatestheyearQflastreappr0val.Asuperscriptepsilon(E)indicatesBDeditoriaichangesincethelastrevisionorreapproval.I.scope1.1Thesemethodscoverthedeterminationoftotalrecoverablephosphorusandorganicphosphorusinsediments.Thesemethodsareapplicabletoaliformsofphosphorusexceptpolyphosphatesandmineraiscontainingtightlyboundphosphorussuchasmanoziteandxe-notime(i)?Themajorityofsedimentsdonotcontainsignificantamountsoffheaboveformsofphosphorusandhencethecontríbutionfromtheseformsisconsideredtobenegíible.Theanalyticalrangeisfrom109to2000pgP/g.Therangeofsamplesueforanalysisis0,lto0.5g.Whenconcentrationoftotalphosphorusexceeds2000pgP/gtherangemaybeextendedbyappropriatedilutionofthesamplesolutionusingreagentwater.ThefoliowingmethodsareincludedMethodA-ManualColorimetricSectionsSamplePreparation6to10AscorbicAcidRe-ductionMethod-MethodA,Section8to16ofMethodD515MethodsBiandB-AutomatedColorimet-ricMethodsUtiUzigReductionProductofMolybdophosphoricAcid(2)12to182.ApplicableDocumeats2.1ASTMStandards:D515TestMethodsforPhosphorusInWa-D1129DefinitionsofTermsRelatingtoD1193SpecificationforReagentWater3D3975PracticeforPreparationofSamplesForCollaborativeTestingofMethodsforAnalysisofSediments3E60RecommendedPracticeforPhotomet-ricMethodsforChemicalAnalysisofMet-ais4te?wate?E275RecommendedPracticeforDescrib-ingMeasuringPerformanceofSpectro-photometers'3.SummaryofMethods3.1Drysedimentsareignitedat550Tfor2handtheresidueafterignitionisdigestedovernightatroomtemperaturewith1.0Mhydrochloricacidpriortodeteminationoftheresulta...
