Designation:D6647−01(Reapproved2011)StandardTestMethodforDeterminationofAcidSolubleIronViaAtomicAbsorption1ThisstandardisissuedunderthefixeddesignationD6647;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheacidsolubleironcontentofgranularandpowderedactivatedcarbons,usinganatomicabsorptionspectroscopymethodbydirectaspiration.Hydrochloricacidisusedtoextracttheiron.Thistestmethodisnotdirectlyusabletodeterminethetotalironconcentrationofasample.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,seeSection8.2.ReferencedDocuments2.1ASTMStandards:2D2652TerminologyRelatingtoActivatedCarbonD1193SpecificationforReagentWaterE11SpecificationforWovenWireTestSieveClothandTestSievesE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE287SpecificationforLaboratoryGlassGraduatedBuretsE288SpecificationforLaboratoryGlassVolumetricFlasksE300PracticeforSamplingIndustrialChemicals2.2NISTPublication:Circular602TestingofGlassVolumetricApparatus33.Terminology3.1Definitions—TermsrelatingtothisstandardaredefinedinTerminologyD2652.3.1.1atomicabsorption—inflameatomicabsorptionspec-trometry,asampleisaspiratedintoaflameandatomized.Alightbeamisdirectedthroughtheflame,intoamonochroma-tor,andontoadetectorthatmeasurestheamountoflightabsorbedbytheatomizedelementintheflame.Becauseeachmetalhasitsowncharacteristicabsorptionwavelength,asourcelampofthatelementisused.Theamountofenergyatthecharacteristicwavelengthabsorbedintheflameispropor-tionaltotheconcentrationoftheelementinthesampleoveralimitedconcentrationrange.4.Summary...
