EPA Method 609 Nitroaromatics and Isophoron

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1、APPENDIXATOPART136METHODSFORORGANICCHEMICALANALYSISOFMUNICIPALANDINDUSTRIALWASTEWATERMETHOD609ÐNITROAROMATICSANDISOPHORONE1.ScopeandApplication1.1Thismethodcoversthedeterminationofcertainnitroaromaticsandisophorone.Thefollowingparametersmaybedeterminedbythismethod:ParameterSTORETNo.CASNo.2,4-D

2、initrotoluene............................34611121-14-22,6-Dinitrotoluene............................34626606-20-2Isophorone.................................3440878-59-1Nitrobenzene................................3444798-95-31.2Thisisagaschromatographic(GC)methodapplicabletothedeterminationofth

3、ecompoundslistedaboveinmunicipalandindustrialdischargesasprovidedunder40CFRPart136.1.Whenthismethodisusedtoanalyzeunfamiliarsamplesforanyorallofthecompoundsabove,compoundidentificationsshouldbesupportedbyatleastoneadditionalqualitativetechnique.Thismethoddescribesanalyticalconditionsforasecond

4、gaschromatographiccolumnthatcanbeusedtoconfirmmeasurementsmadewiththeprimarycolumn.Method625providesgaschromatograph/massspectrometer(GC/MS)conditionsappropriateforthequalitativeandquantitativeconfirmationofresultsforalloftheparameterslistedabove,usingtheextractproducedbythismethod.11.3Themeth

5、oddetectionlimit(MDL,definedinSection14.1)foreachparameterislistedinTable1.TheMDLforaspecificwastewatermaydifferfromthoselisted,dependinguponthenatureofinterferencesinthesamplematrix.1.4ThesampleextractionandconcentrationstepsinthismethodareessentiallythesameasinMethods606,608,611,and612.Thus,

6、asinglesamplemaybeextractedtomeasuretheparametersincludedinthescopeofeachofthesemethods.Whencleanupisrequired,theconcentrationlevelsmustbehighenoughtopermitselectingaliquots,asnecessary,toapplyappropriatecleanupprocedures.Theanalystisallowedthelatitude,underSection12,toselectchromatographiccon

7、ditionsappropriateforthesimultaneousmeasurementofcombinationsoftheseparameters.1.5Anymodificationofthismethod,beyondthoseexpresslypermitted,shallbeconsideredasamajormodificationsubjecttoapplicationandapprovalofalternatetestproceduresund