Designation:D3920−12StandardTestMethodforStrontiuminWater1ThisstandardisissuedunderthefixeddesignationD3920;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofdissolvedandtotalrecoverablestrontiuminwaterandwastewaterbyatomicabsorptionspectroscopy.1.2Thetestmethodisapplicableintherangefrom0.1to1mg/Lofstrontium.Therangemaybeextendedbydilutionoftheoriginalsample.1.3Round-robindatawereobtainedinnaturalandreagentwatermatrices.Itistheuser’sresponsibilitytoensurethevalidityofthetestmethodforwatersofuntestedmatrices.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemaremathematicalconversionsandmaynotbeexactequivalents;therefore,eachsystemshallbeusedinde-pendentlyoftheother.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninand.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromClosedConduitsD4691PracticeforMeasuringElementsinWaterbyFlameAtomicAbsorptionSpectrophotometryD4841PracticeforEstimationofHoldingTimeforWaterSamplesContainingOrganicandInorganicConstituentsD5810GuideforSpikingintoAqueousSamplesD5847PracticeforWritingQualityControlSpecificationsforStandardTestMethodsforWaterAnalysis3.Terminology3.1Definitions:Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD1129.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1totalrecoverablestrontium,n...
