EPA Method 555 Determination of Chlorinated Acids

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1、METHOD555DETERMINATIONOFCHLORINATEDACIDSINWATERBYHIGHPERFORMANCELIQUIDCHROMATOGRAPHYWITHAPHOTODIODEARRAYULTRAVIOLETDETECTORRevision1.0August1992JamesW.EichelbergerWinslowJ.Bashe(TechnologyApplications,Inc.)ENVIRONMENTALMONITORINGSYSTEMSLABORATORYOFFICEOFRESEARCHANDDEVELOPMENTU.

2、S.ENVIRONMENTALPROTECTIONAGENCYCINCINNATI,OHIO45268555-1METHOD555DETERMINATIONOFCHLORINATEDACIDSINWATERBYHIGHPERFORMANCELIQUIDCHROMATOGRAPHYWITHAPHOTODIODEARRAYULTRAVIOLETDETECTOR1.0SCOPEANDAPPLICATION1.1Thisisahighperformanceliquidchromatographic(HPLC)methodforthedetermination

3、ofcertainchlorinatedacidsingroundwaterandfinisheddrinkingwater.Thefollowingcompoundscanbedeterminedbythismethod:ChemicalAbstractServicesAnalyteRegistryNumberAcifluorfen50594-66-6Bentazon25057-89-0aChloramben133-90-42,4-D94-75-72,4-DB94-82-6Dicamba1918-00-93,5-Dichlorobenzoicaci

4、d51-36-5Dichlorprop120-36-5Dinoseb88-85-7a5-Hydroxydicamba7600-50-2MCPAMCPPa4-Nitrophenol100-02-7bPentachlorophenol(PCP)87-86-5aPicloram1918-02-12,4,5-T93-76-52,4,5-TP93-72-1aAnalytesmeasurablefrom20mLsamplevolumeonly.bUsea100mLsampleforpentachlorophenolinordertoattainaMDLof0.3

5、µg/L.TheMLCforthiscompoundis1.0µg/L.1.2Thismethodisapplicabletothedeterminationofsaltsandestersofanalyteacids.Theformofeachanalyteisnotdistinguishedbythismethod.Resultsarecalculatedandreportedforeachlistedanalyteasthetotalfreeacid.1.3Thismethodhasbeenvalidatedinasinglelaborator

6、yandmethoddetection1limits(MDLs)havebeendeterminedfroma20mLsamplefortheanalytesabove.ObservedMDLsmayvaryamonggroundwaters,dependingonthenatureofinterferencesinthesamplematrixandthespecificinstrumentationused.555-21.4Thismethodisrestrictedtousebyorunderthesupervisionofanalystsex

7、periencedintheuseofHPLCandintheinterpretationofchromatograms.EachanalystmustdemonstratetheabilitytogenerateacceptableresultswiththismethodusingtheproceduredescribedinSection9.3.1.5Analytesthatarenotseparatedchromatographicallycannotbeindividuallyidentifiedandmeasuredinthesameca

8、librationmixtureorwatersampleunlessanalternativetechni