Designation:D6647−18StandardTestMethodforDeterminationofAcidSolubleIronviaAtomicAbsorption1ThisstandardisissuedunderthefixeddesignationD6647;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheacidsolubleironcontentofgranularandpowderedactivatedcarbons,usinganatomicabsorptionspectroscopymethodbydirectaspiration.Hydrochloricacidisusedtoextracttheiron.Thistestmethodisnotdirectlyusabletodeterminethetotalironconcentrationofasample.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,seeSection8.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD2652TerminologyRelatingtoActivatedCarbonE11SpecificationforWovenWireTestSieveClothandTestSievesE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE287SpecificationforLaboratoryGlassGraduatedBuretsE288SpecificationforLaboratoryGlassVolumetricFlasksE300PracticeforSamplingIndustrialChemicalsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod2.2NISTPublication:3Circular602TestingofGlassVolumetricApparatus3.Terminology3.1Definitions—TermsrelatingtothisstandardaredefinedinTerminologyD2652.3.1.1atomicabsorption—inflameatomicabsorptionspectrometry,asampleisaspiratedintoaflameandatomized.Alightbeamisdirectedthro...
