Designation:D8344−20StandardPracticeforAmmoniumBifluorideandNitricAcidDigestionofAirborneDustandDust-WipeSamplesfortheDeterminationofMetalsandMetalloids1ThisstandardisissuedunderthefixeddesignationD8344;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedigestionofairborneandsurfacedustsamples(collectedusingairandwipesamplingpractices)andassociatedqualitycontrol(QC)samplesforthedeterminationofmetalsandmetalloidsbymeansofamixtureofdiluteammoniumbifluorideandnitricacid.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thispracticecontainsnoteswhichareexplanatoryandnotpartofmandatoryrequirementsofthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD4185TestMethodforMeasurementofMetalsinWork-placeAtmospheresbyFlameAtomicAbsorptionSpectro-photometryD4532TestMethodforRespirableDustinWorkplaceAt-mospheresUsingCycloneSamplersD4840GuideforSampleChain-of-CustodyProceduresD6062GuideforPersonalSamplersofHealth-RelatedAero-solFractionsD6785TestMethodforDeterminationofLeadinWorkplaceAirUsingFlameorGraphiteFurnaceAtomicAbsorptionSpectrometryD6966PracticeforCollectionof...
