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1、APPENDIXATOPART136METHODSFORORGANICCHEMICALANALYSISOFMUNICIPALANDINDUSTRIALWASTEWATERMETHOD609DNITROAROMATICSANDISOPHORONE1.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
