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1、METHOD7010GRAPHITEFURNACEATOMICABSORPTIONSPECTROPHOTOMETRY1.0SCOPEANDAPPLICATION1.1Metalsinsolutionmaybereadilydeterminedbygraphitefurnaceatomicabsorptionspectrophotometry(GFAA).Themethodissimple,quick,andapplicabletoalargenumberofmetalsinenvironmentals
2、amplesincluding,butnotlimitedto,groundwater,domesticandindustrialwastes,extracts,soils,sludges,sediments,andsimilarwastes.Withtheexceptionoftheanalysesfordissolvedconstituents,allsamplesrequiredigestionpriortoanalysis.Analysisfordissolvedelementsdoesnot
3、requiredigestionifthesamplehasbeenfilteredandthenacidified.NOTE:Theanalystshouldbeawarethatorgano-metallicspeciesmaynotbedetectedifthesampleisnotdigested.Thismethodisapplicabletothefollowingelements:aElementCASRNAntimony(Sb)7440-36-0Arsenic(As)7440-38-2
4、Barium(Ba)7440-39-3Beryllium(Be)7440-41-7Cadmium(Cd)7440-43-9Chromium(Cr)7440-47-3Cobalt(Co)7440-48-4Copper(Cu)7440-50-8Iron(Fe)7439-89-6Lead(Pb)7439-92-1Manganese(Mn)7439-96-5Molybdenum(Mo)7439-98-7Nickel(Ni)7440-02-0Selenium(Se)7782-49-2Silver(Ag)7440
5、-22-4Thallium(Tl)7440-28-0Vanadium(V)7440-62-2Zinc(Zn)7440-66-6aChemicalAbstractServiceRegistryNumber1.2Methoddetectionlimits,sensitivity,andoptimumrangesofthemetalswillvarywiththematricesandmodelsofatomicabsorptionspectrophotometers.ThedatashowninTable
6、1providesomeindicationofthedetectionlimitsobtainablebythefurnacetechnique.ThedetectionlimitsgiveninTable1aresomewhatdependentonequipment(suchasthetypeofspectrophotometerandfurnaceaccessory,theenergysource,thedegreeofelectricalexpansionoftheoutputsignal)
7、,andaregreatlydependentonsamplematrix.Methoddetectionlimits(MDLs)mustbeestablished,empirically,foreachmatrixtypeanalyzed(refertoChapterOneforguidance)andarerequiredforeachpreparatory/determinativemethodcombinationused.CD-ROM7010-1Revision0January19981.3
8、Usersofthismethodshouldstatethedataqualityobjectivespriortoanalysisandmustdocumentandhaveonfiletherequiredinitialdemonstrationperformancedatadescribedinthefollowingsectionspriortousingthemethodforanalysis.Whenusingfurnacetechniqu
