EPA Method 552.1 Determination of Haloacetic Acids

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1、METHOD552.1DETERMINATIONOFHALOACETICACIDSANDDALAPONINDRINKINGWATERBYION-EXCHANGELIQUID-SOLIDEXTRACTIONANDGASCHROMATOGRAPHYWITHANELECTRONCAPTUREDETECTORRevision1.0August1992JimmieW.HodgesonDavidBecker(TechnologyApplicationsInc.)ENVIRONMENTALMONITORINGSYSTEMSLABORATORYOFFICEOFRESEARCHANDDEVELOPME

2、NTU.S.ENVIRONMENTALPROTECTIONAGENCYCINCINNATI,OHIO45268552.1-1METHOD552.1DETERMINATIONOFHALOACETICACIDSANDDALAPONINDRINKINGWATERBYION-EXCHANGELIQUID-SOLIDEXTRACTIONANDGASCHROMATOGRAPHYWITHELECTRONCAPTUREDETECTION1.0SCOPEANDAPPLICATION11.1Thisisagaschromatographic(GC)methodapplicabletothedetermi

3、nationofthelistedhalogenatedaceticacidsindrinkingwater,groundwater,rawwaterandwateratanyintermediatetreatmentstage.Inaddition,thechlorinatedherbicide,Dalapon,isdeterminedusingthismethod.ChemicalAbstractServicesAnalyteRegistryNumberMonochloroaceticAcid79-11-8DichloroaceticAcid79-43-6Trichloroace

4、ticAcid76-03-9MonobromoaceticAcid79-08-3BromochloroaceticAcid5589-96-8DibromoaceticAcid631-64-1Dalapon75-99-01.2Thisisaliquid-solidextractionmethodandisdesignedasasimplifiedalternativetotheliquid-liquidextractionapproachofMethod552forthehaloaceticacids.Thismethodalsoprovidesamuchsuperiortechniq

5、ueforthedeterminationoftheherbicide,dalapon,comparedtothecomplexherbicideproceduredescribedinMethod515.1.Theprocedurealsorepresentsamajorstepintheincorporationofpollutionpreventioninmethodsdevelopment,inthattheuseoflargevolumesoforganicsolventsiseliminated.1.3Thismethodisapplicabletothedetermin

6、ationofthetargetanalytesoverthe2,3concentrationrangestypicallyfoundindrinkingwater,subjecttothemethoddetectionlimits(MDL)listedinTable2.TheMDLsobservedmayvaryaccordingtotheparticularmatrixanalyzedandthespecificinstrumentationemployed.Thehaloaceticacidsareobservedubiquitouslyinchlorinatedsupplie

7、satconcentrationsrangingfrom<1to>50µg/L.1.4Reducedanalyterecoveriesmaybeobservedinhighionicstrengthmatrices,particularlywaterscontainingelevatedsulfateconcentrations.Improvedrecoveriesmaybeobtainedbysampledilutionattheexpenseofhig