Designation:D3859−15StandardTestMethodsforSeleniuminWater1ThisstandardisissuedunderthefixeddesignationD3859;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodscoverthedeterminationofdissolvedandtotalrecoverableseleniuminmostwatersandwastewaters.Bothtestmethodsutilizeatomicabsorptionprocedures,asfollows:SectionsTestMethodA—GaseousHydrideAAS2,37–16TestMethodB—GraphiteFurnaceAAS17–261.2Thesetestmethodsareapplicabletobothinorganicandorganicformsofdissolvedselenium.Theyareapplicablealsotoparticulateformsoftheelement,providedthattheyaresolubilizedintheappropriateaciddigestionstep.However,certainselenium-containingheavymetallicsedimentsmaynotundergodigestion.1.3Thesetestmethodsaremostapplicablewithinthefollowingranges:TestMethodA—GaseousHydrideAAS2,31to20µg/LTestMethodB—GraphiteFurnaceAAS2to100µg/LTheserangesmaybeextended(withacorrespondinglossinprecision)bydecreasingthesamplesizeordilutingtheoriginalsample,butconcentrationsmuchgreaterthantheupperlimitsaremoreconvenientlydeterminedbyflameatomicabsorptionspectrometry.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,see11.12and13.14.2.ReferencedDocuments2.1ASTMStandards:4D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromClosedConduitsD3919Practicefor...
