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1、METHOD3580AWASTEDILUTION1.0SCOPEANDAPPLICATION1.1Thismethoddescribesasolventdilutionofanon-aqueouswastesamplepriortocleanupand/oranalysis.Itisdesignedforwastesthatmaycontainorganicchemicalsataconcentrationgreaterthan20,000mg/kgandthataresolubleinthedilutionsolvent.1.2Itis
2、recommendedthatanaliquotofthedilutedsamplebecleanedup.Seethischapter,OrganicAnalytes,Section4.2.2(Cleanup).2.0SUMMARYOFMETHOD2.1Onegramofsampleisweighedintoacappedtube,andthesampleisdilutedto10.0mLwithanappropriatesolvent.3.0INTERFERENCES3.1RefertoMethod3500.4.0APPARATUSA
3、NDMATERIALS4.1Glassscintillationvials:Atleast20mL,withTeflonoraluminumfoillinedscrew-cap,orequivalent.4.2Spatula:StainlesssteelorTeflon.4.3Balance:Capableofweighing100gtothenearest0.01g.4.4Vialsandcaps:2mLforGCautosampler.4.5Disposablepipets:Pasteur.4.6Testtuberack.4.7Pyr
4、exglasswool.4.8Volumetricflasks,ClassA:10mL(optional).5.0REAGENTS5.1Sodiumsulfate(granular,anhydrous),Na2SO4.Purifybyheatingato400Cfor4hoursinashallowtray,orbyprecleaningthesodiumsulfatewithmethylenechloride.Ifthesodiumsulfateisprecleanedwithmethylenechloride,CD-ROM3580A-
5、1Revision1July1992amethodblankmustbeanalyzed,demonstratingthatthereisnointerferencefromthesodiumsulfate.5.2Methylenechloride,CH2Cl2-Pesticidequalityorequivalent.5.3Hexane,C6H14-Pesticidequalityorequivalent.6.0SAMPLECOLLECTION,PRESERVATION,ANDHANDLING6.1Seetheintroductorym
6、aterialtothischapter,OrganicAnalytes,Section4.1.7.0PROCEDURE7.1Samplesconsistingofmultiphasesmustbepreparedbythephaseseparationmethod(ChapterTwo)beforeextraction.7.2Thesampledilutionmaybeperformedina10mLvolumetricflask.Ifdisposableglasswareispreferred,the20mLscintillation
7、vialmaybecalibratedforuse.Pipet10.0mLofextractionsolventintothescintillationvialandmarkthebottomofthemeniscus.Discardthissolvent.7.3Transferapproximately1gofeachphaseofthesampletoseparate20mLvialsor10mLvolumetricflasks(recordweighttothenearest0.1g).Wipethemouthofthevialwi
8、thatissuetoremoveanysamplematerial.Capthevialbeforeproceedingwiththenextsampletoavoidanycross-co
