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1、METHOD551DETERMINATIONOFCHLORINATIONDISINFECTIONBYPRODUCTSANDCHLORINATEDSOLVENTSINDRINKINGWATERBYLIQUID-LIQUIDEXTRACTIONANDGASCHROMATOGRAPHYWITHELECTRON-CAPTUREDETECTIONJuly1990J.W.HodgesonA.L.CohenENVIRONMENTALMONITORINGSYSTEMSLABORATORYOFFICEOFRESEARCHANDDEVELOPMENTU.S.ENV
2、IRONMENTALPROTECTIONAGENCYCINCINNATI,OHIO45268551-1METHOD551DETERMINATIONOFCHLORINATIONDISINFECTIONBYPRODUCTSANDCHLORINATEDSOLVENTSINDRINKINGWATERBYLIQUID-LIQUIDEXTRACTIONANDGASCHROMATOGRAPHYWITHELECTRON-CAPTUREDETECTION1.0SCOPEANDAPPLICATION1-41.1Thismethodisapplicabletothe
3、determinationofthefollowinganalytesinfinisheddrinkingwater,drinkingwaterduringintermediatestagesoftreatment,andrawsourcewater:ChemicalAbstractServicesAnalyteRegistryNumberBromochloroacetonitrile83463-62-1Bromodichloromethane75-27-4Bromoform75-25-2CarbonTetrachloride56-23-5Ch
4、loralHydrate75-87-6Chloroform67-66-3Chloropicrin76-06-2Dibromoacetonitrile3252-43-5Dibromochloromethane124-48-11,2-Dibromo-3-chloropropane[DBCP]96-12-81,2-Dibromoethane[EDB]106-93-4Dichloroacetonitrile3018-12-0Trichloroacetonitrile545-06-2Tetrachloroethylene127-18-41,1,1-Tri
5、chloroethane71-55-6Trichloroethylene79-01-61,1,1-Trichloro-2-propanone918-00-31,1-Dichloro-2-propanone513-88-21.2Thisanalytelistincludes12commonlyobservedchlorinationdisinfection3,4byproductsandsixcommonlyusedchlorinatedorganicsolvents-carbontetrachloride,1,2-dibromo-3-chlor
6、opropane(DBCP),1,2-dibromoethane(EDB),tetrachloroethylene,1,1,1-tri-chloroethaneandtrichloroethylene.1.3Thismethodisintendedasastand-aloneprocedurefortheanalysisofonlythetrihalomethanes(THMs)orasaprocedureforthetotalanalytelist.Thedechlorination/preservationtechniquepresente
7、dinSection8.0differsforthetwomodesofoperation,withasimplertechniqueavailablefortheTHManalysis.ThesixsolventsmaybeanalyzedintheTHMmode,sincethesamedechlorinationreagentsmaybeemployed.551-251.4Theexperimentallydeterminedmethoddetectionlimits(MDLs)fortheabovelistedanalytesarepr
8、ovidedinTable2.ActualMDLvalueswillvaryaccordingtotheparticularmatrixanalyze
