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1、METHOD3051AMICROWAVEASSISTEDACIDDIGESTIONOFSEDIMENTS,SLUDGES,SOILS,ANDOILS1.0SCOPEANDAPPLICATION1.1Thismicrowaveextractionmethodisdesignedtomimicextractionusingconventionalheatingwithnitricacid(HNO3),oralternatively,nitricacidandhydrochloricacid(HCl),accordingtoEPAMethods200.2and3050.Si
2、ncethesemethodsarenotintendedtoaccomplishtotaldecompositionofthesample,theextractedanalyteconcentrationsmaynotreflectthetotalcontent‡inthesample.Thismethodisapplicabletothemicrowave-assistedacidextraction/dissolutionofsediments,sludges,soils,andoilsforthefollowingelements:aElementCASRNA
3、luminum(Al)7429-90-5*Antimony(Sb)7440-36-0*Arsenic(As)7440-38-2Barium(Ba)7440-39-3*Beryllium(Be)7440-41-7*Boron(B)7440-42-8Cadmium(Cd)7440-43-9Calcium(Ca)7440-70-2Chromium(Cr)7440-47-3*Cobalt(Co)7440-48-4Copper(Cu)7440-50-8Iron(Fe)7439-89-6*Lead(Pb)7439-92-1Magnesium(Mg)7439-95-4*Mangan
4、ese(Mn)7439-96-5Mercury(Hg)7439-97-6Molybdenum(Mo)7439-98-7Nickel(Ni)7440-02-0Potassium(K)7440-09-7Selenium(Se)7782-49-2Silver(Ag)7440-22-4*Sodium(Na)7440-23-5Strontium(Sr)7440-24-6Thallium(Tl)7440-28-0Vanadium(V)7440-62-2*Zinc(Zn)7440-66-6aChemicalAbstractServiceRegistryNumber*Indicate
5、selementswhichtypicallyrequiretheadditionofHCltoachieveequivalentresultswithEPAMethod3050,asnotedinreference3.‡Note:Formatricessuchascertaintypesofoils,thismethodmayormaynotprovidetotalsampledissolution.Forothermatrices,suchassoilsandsediments,CD-ROM3051A-1Revision1January1998itshouldbe
6、consideredanextractionmethod.Otherelementsandmatricesmaybeanalyzedbythismethodifperformanceisdemonstratedfortheanalyteofinterest,inthematricesofinterest,attheconcentrationlevelsofinterest(seeSec.9.0).1.2ThismethodisprovidedasanalternativetoEPAMethods200.2and3050.Thismethodprovidesoption
7、sforimprovingtheperformanceforcertainanalytes,suchasantimony,iron,aluminum,andsilverbytheadditionofhydrochloricacid,whennecessary.Itisintendedtoprovidearapidmulti-elementacidextractionordissolutionpriortoanalysissothatdecisionscanbemadeaboutmaterialsandsitecleanuplevels,theneed
