資源描述：
《EPA METHOD 3585 Waste Dilution for Volatile Organics》由會員上傳分享，免費在線閱讀，更多相關內容在行業(yè)資料-天天文庫。
1、METHOD3585WASTEDILUTIONFORVOLATILEORGANICS1.0SCOPEANDAPPLICATION1.1Thismethoddescribesasolventdilutionofanon-aqueouswastesamplepriortodirectinjectionanalysis.ItisdesignedforuseinconjunctionwithGCorGC/MSanalysisofwastesthatmaycontainorganicchemicalsataconce
2、ntrationgreaterthan1mg/kgandthataresolubleinthedilutionsolvent.Method3585hasadequatesensitivitytodeterminetheregulatoryconcentrationsoftheToxicityCharacteristic(TC)Rule.1.2Thismethodmaybeusedwithn-hexadecanefordirectinjectionoftargetvolatilesinoilymatrices
3、.1.3Useofa1-2μLinjectionofa1:1dilutioncanbeusedtoprovidedetectionlimitsof0.5ppmforvolatiletargetanalyteswithasensitiveGC/MS.1.4Thismethodisrestrictedtousebyorunderthesupervisionoftrainedanalysts.Eachanalystmustdemonstratetheabilitytogenerateacceptableresul
4、tswiththismethod.2.0SUMMARYOFMETHOD2.1Highlycontaminatedorhighlycomplexsamplesmaybedilutedpriortoanalysisforvolatilesusingdirectinjection.2.2Onegramofsampleisweighedintoacappedtubeorvolumetricflask.Thesampleisdilutedto2.0-10.0mLwithn-hexadecaneorotherappro
5、priatesolvent.2.3DilutedsamplesareinjectedintotheGCorGC/MSforanalysis.3.0INTERFERENCES3.1Useofadirectinjectionprocedurewillresultinconsiderablecontaminationofinjectionports,injectionportliners,GCcolumns,anddetectors.APyrex?woolplugshouldbeplacedintotheinje
6、ctionportlinerandthelinershouldbechangedafterevery12hoursofsampleanalysis.3.2Thesolventusedforwastedilutionmaycontainvolatilecontaminantsthatcouldinterferewithanalyses.3.2.1n-Hexadecaneelutesaftertargetvolatiles.However,volatileimpuritiesinn-hexadecanemayi
7、nterferewithanalyses.3.2.2Eachlotofn-hexadecane(oranyothersolventusedfordilution)mustbeanalyzedforimpuritiespriortouse.3.3Thepresenceofmethanolandotheroxygenatedsolventsinsamplesmayleadtobaselinehumpsthatinterferewithqualitativeandquantitativeanalysisofear
8、lyelutingtargetanalyteswhendirectinjectionisemployed.CD-ROM3585-1Revision0December19964.0APPARATUSANDMATERIALS4.1Glassscintillationvials-Atleast20-mL,withpolytetrafluoroethylene(PTFE)-oraluminumfoil-linedscre
