Designation:D5198−09StandardPracticeforNitricAcidDigestionofSolidWaste1ThisstandardisissuedunderthefixeddesignationD5198;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesthedigestionofsolidwasteusingnitricacidforthesubsequentdeterminationofinorganicconstituentsbyplasmaemissionspectroscopyoratomicab-sorptionspectroscopy.1.2Thefollowingelementsmaybesolubilizedbythispractice:aluminummanganeseberylliummercurycadmiumnickelchromiumphosphoruscoppervanadiumironzinclead1.3Thispracticeistobeusedwhentheconcentrationsoftotalrecoverableelementsaretobedeterminedfromawastesample.Totalrecoverableelementsmayormaynotbeequiva-lenttototalelements,dependingontheelementsoughtandthesamplematrix.Recoveryfromrefractorysamplematrices,suchassoils,isusuallysignificantlylessthantotalconcentra-tionsoftheelementspresent.NOTE1—Thispracticehasbeenusedsuccessfullyforoilysludgesandamunicipaldigestedsludgestandard[EnvironmentalProtectionAgency(EPA)SampleNo.397].Thepracticemaybeapplicabletosomeelementsnotlistedabove,suchasarsenic,barium,selenium,cobalt,magnesium,andcalcium.Refractoryelementssuchassilicon,silver,andtitanium,aswellasorgano-mercuryarenotsolubilizedbythispractice.1.4Thispracticehasbeendividedintotwomethods,AandB,toaccountfortheadventofdigestionblocks.MethodAutilizesanelectrichotplate;MethodButilizesanelectricdigestionblock.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:2D1193Speci...
