EPA Method 8141A Organophosphorus Compounds by Gas Chromatography

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1、METHOD8141AORGANOPHOSPHORUSCOMPOUNDSBYGASCHROMATOGRAPHY:CAPILLARYCOLUMNTECHNIQUE1.0SCOPEANDAPPLICATION1.1Method8141isacapillarygaschromatographic(GC)methodusedtodeterminetheconcentrationoforganophosphorus(OP)compounds.Thefused-silica,open-tubularcolumnsspecifiedinthismethodofferim

2、provedresolution,betterselectivity,increasedsensitivity,andfasteranalysisthanpackedcolumns.ThecompoundslistedinthetablebelowcanbedeterminedbyGCusingcapillarycolumnswithaflamephotometricdetector(FPD)oranitrogen-phosphorusdetector(NPD).Triazineherbicidescanalsobedeterminedwiththisme

3、thodwhentheNPDisused.Althoughperformancedataarepresentedforeachofthelistedchemicals,itisunlikelythatallofthemcouldbedeterminedinasingleanalysis.Thislimitationresultsbecausethechemicalandchromatographicbehaviorofmanyofthesechemicalscanresultinco-elution.Theanalystmustselectcolumns,

4、detectorsandcalibrationproceduresforthespecificanalytesofinterestinastudy.Anylistedchemicalisapotentialmethodinterferencewhenitisnotatargetanalyte.CompoundNameCASRegistryNo.OPPesticidesbAspon,3244-90-4Azinphos-methyl86-50-0aAzinphos-ethyl2642-71-9Bolstar(Sulprofos)35400-43-2aCarbo

5、phenothion786-19-6aChlorfenvinphos470-90-6Chlorpyrifos2921-88-2aChlorpyrifosmethyl5598-13-0Coumaphos56-72-4aCrotoxyphos7700-17-6cDemeton-O8065-48-3cDemeton-S8065-48-3Diazinon333-41-5aDichlorofenthion97-17-6Dichlorvos(DDVP)62-73-7aDicrotophos141-66-2Dimethoate60-51-5a,cDioxathion78

6、-34-2Disulfoton298-04-4EPN2104-64-5aEthion563-12-2Ethoprop13194-48-4aFamphur52-85-7aFenitrothion122-14-5Fensulfothion115-90-2CD-ROM8141A-1Revision1September1994CompoundNameCASRegistryNo.aFonophos944-22-9Fenthion55-38-9a,dLeptophos21609-90-5Malathion121-75-5cMerphos150-50-5eMevinph

7、os7786-34-7Monocrotophos6923-22-4Naled300-76-5Parathion,ethyl56-38-2Parathion,methyl298-00-0Phorate298-02-2aPhosmet732-11-6aPhosphamidon13171-21-6Ronnel299-84-3Stirophos(Tetrachlorovinphos)22248-79-9Sulfotepp3689-24-5dTEPP21646-99-1aTerbufos13071-79-9a,bThionazin(Zinophos)297-97-2

8、bTokuthion(Protothiofos)34643-46-