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1、METHOD515.1DETERMINATIONOFCHLORINATEDACIDSINWATERBYGASCHROMATOGRAPHYWITHANELECTRONCAPTUREDETECTORRevision4.1EditedbyJ.W.Munch(1995)R.C.DressmanandJ.J.Lichtenberg-EPA600/4-81-053,Revision1.0(1981)J.W.Hodgeson-Method515,Revision2.0(1986)D.J.Munch(USEPA,OfficeofWate
2、r)andT.Engel(BattelleColumbusLaboratories)-NationalPesticideSurveyMethod3,Revision3.0(1987)R.L.Graves-Method515.1,Revision4.0(1989)NATIONALEXPOSURERESEARCHLABORATORYOFFICEOFRESEARCHANDDEVELOPMENTU.S.ENVIRONMENTALPROTECTIONAGENCYCINCINNATI,OHIO45268515.1-1METHOD51
3、5.1DETERMINATIONOFCHLORINATEDACIDSINWATERBYGASCHROMATOGRAPHYWITHANELECTRONCAPTUREDETECTOR1.0SCOPEANDAPPLICATION1.1Thisisagaschromatographic(GC)methodapplicabletothedeterminationofcertainchlorinatedacidsingroundwaterandfinisheddrinkingwater.Thefollowingcompoundsca
4、nbedeterminedbythismethod:ChemicalAbstractServicesAnalyteRegistryNumberAcifluorfen*50594-66-6Bentazon25057-89-0Chloramben*133-90-42,4-D94-75-7Dalapon*75-99-02,4-DB94-82-6aDCPAAcidMetabolitesDicamba1918-00-93,5-DichlorobenzoicAcid51-36-5Dichlorprop120-36-5Dinoseb8
5、8-85-75-Hydroxydicamba7600-50-24-Nitrophenol*100-02-7Pentachlorophenol(PCP)87-86-5Picloram1918-02-12,4,5-T93-76-52,4,5-TP93-72-1aDCPAmonoacidanddiacidmetabolitesincludedinmethodscope;DCPAdiacidmetaboliteusedforvalidationstudies.*Thesecompoundsareonlyqualitatively
6、identified.Thesecompoundsarenotquantitatedbecausecontroloverprecisionhasnotbeenaccomplished.1.2Thismethodisalsoapplicabletothedeterminationofsaltsandestersofanalyteacids.Theformofeachacidisnotdistinguishedbythismethod.Resultsarecalculatedandreportedforeachlisteda
7、nalyteasthetotalfreeacid.1.3Thismethodhasbeenvalidatedinasinglelaboratoryandestimateddetectionlimits(EDLs)andmethoddetectionlimits(MDLs)havebeendeterminedfortheanalytesabove(Section13.0).Observeddetectionlimitsmayvarybetweengroundwaters,dependinguponthenatureofin
8、terferencesinthesamplematrixandthespecificinstrumentationused.515.1-21.4ThismethodisrestrictedtousebyorunderthesupervisionofanalystsexperiencedintheuseofGCandi
