EPA METHOD 1320 Multiple Extraction Procedure

《EPA METHOD 1320 Multiple Extraction Procedure》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、METHOD1320MULTIPLEEXTRACTIONPROCEDURE1.0SCOPEANDAPPLICATIONTheMultipleExtractionProcedure(MEP)describedinthismethodisdesignedtosimulatetheleachingthatawastewillundergofromrepetitiveprecipitationofacidrainonanimproperlydesignedsanitarylandfill.Therepetitiveextractionsrevealthehighestconcentrati

2、onofeachconstituentthatislikelytoleachinanaturalenvironment.Method1320isapplicabletoliquid,solid,andmultiphasesamples.2.0SUMMARYOFMETHODWastesamplesareextractedaccordingtotheExtractionProcedureToxicityTest(Method1310,Chapter8)andanalyzedfortheconstituentsofconcernlistedinChapter7,Table7-1:Maxi

3、mumConcentrationofContaminantsforCharacteristicofEPToxicity,usingthe7000and8000seriesmethods.ThenthesolidportionsofthesamplesthatremainafterapplicationofMethod1310arere-extractedninetimesusingsyntheticacidrainextractionfluid.Iftheconcentrationofanyconstituentofconcernincreasesfromthe7thor8thex

4、tractiontothe9thextraction,theprocedureisrepeateduntiltheseconcentrationsdecrease.3.0INTERFERENCESPotentialinterferencesthatmaybeencounteredduringanalysisarediscussedintheappropriateanalyticalmethods.4.0APPARATUSANDMATERIALS4.1RefertoMethod1310.5.0REAGENTS5.1RefertoMethod1310.5.2Sulfuricacid:n

5、itricacid,60/40weightpercentmixture:Cautiouslymix60gofconcentratedsulfuricacidwith40gofconcentratednitricacid.6.0SAMPLECOLLECTION,PRESERVATION,ANDHANDLING6.1RefertoMethod1310.13201CD-ROMRevision0DateSeptember19867.0PROCEDURE7.1RuntheExtractionProcedure(EP)testinMethod1310.7.2Analyzetheextractf

6、ortheconstituentsofinterest.7.3Prepareasyntheticacidrainextractionfluidbyaddingthe60/40weightpercentsulfuricacidandnitricacidtodistilleddeionizedwateruntilthepHis3.0+0.2.7.4TakethesolidphaseofthesampleremainingaftertheSeparationProcedureoftheExtractionProcedureandweighit.Measureanaliquotofsynt

7、heticacidrainextractionfluidequalto20timestheweightofthesolidsample.Donotallowthesolidsampletodrybeforeweighing.7.5CombinethesolidphasesampleandacidrainfluidinthesameextractorasusedintheEPandbeginagitation.RecordthepHwithin5-10minaftera