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《EPA Method 504.1 1,2-Dibromoethane (EDB), 1,2-Dibromo-3-Chloropropane》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、METHOD504.11,2-DIBROMOETHANE(EDB),1,2-DIBROMO-3-CHLORO-PROPANE(DBCP),AND1,2,3-TRICHLOROPROPANE(123TCP)INWATERBYMICROEXTRACTIONANDGASCHROMATOGRAPHYRevision1.1EditedbyJ.W.Munch(1995)T.W.Winfield-Method504,Revision1.0(1986)T.W.Winfield-Method504,Revision2.0(1989)JamesW.Eichelberger-Method504.1,Revision
2、1.0(1993)NATIONALEXPOSURERESEARCHLABORATORYOFFICEOFRESEARCHANDDEVELOPMENTU.S.ENVIRONMENTALPROTECTIONAGENCYCINCINNATI,OHIO45268504.1-1METHOD504.11,2-DIBROMOETHANE(EDB),1,2-DIBROMO-3-CHLOROPROPANE(DBCP),AND1,2,3-TRICHLOROPROPANE(123TCP)INWATERBYMICROEXTRACTIONANDGASCHROMATOGRAPHY1.0SCOPEANDAPPLICATION
3、1-31.1Thismethodisapplicabletothedeterminationofthefollowingcompoundsinfinisheddrinkingwaterandgroundwater:ChemicalAbstractServicesAnalyteRegistryNumber1,2-Dibromoethane106-93-41,2-Dibromo-3-Chloropropane96-12-81,2,3-Trichloropropane96-18-41.2Forcompoundsotherthantheabovementionedanalytes,orforother
4、samplesources,theanalystmustdemonstratetheusefulnessofthemethodbycollectingprecisionandaccuracydataonactualsamplesandprovidequalitative4confirmationofresultsbygaschromatography/massspectrometry(GC/MS).51.3Theexperimentallydeterminedmethoddetectionlimits(MDL)forEDBandDBCPwerecalculatedtobe0.01µg/Land
5、theMDLfor123TCPwascalculatedtobe0.02µg/L.Themethodhasbeenusefulfortheseanalytesoveraconcentrationrangefromapproximately0.03-200µg/L.Actualdetectionlimitsarehighlydependentuponthecharacteristicsofthegaschromatographicsystemused.2.0SUMMARYOFMETHOD2.1Thirty-fivemLofsampleareextractedwith2mLofhexane.Two
6、µLoftheextractaretheninjectedintoagaschromatographequippedwithalinearizedelectroncapturedetectorforseparationanddetection.Analytesarequantitatedusingproceduralstandardcalibration(Section3.12).2.2Theextractionandanalysistimeis30-50minutespersampledependingupontheanalyticalconditionschosen.2.3Confirma
7、toryevidenceshouldbeobtainedforallpositiveresults.Thisdatamaybeobtainedbyusingretentiondatafromadissimilarcolumn,orwhenconcentrationsaresufficientlyhighbyGC/MS.PurgeandtraptechniquesusingMethods502.2o
