EPA METHOD 3542 Extraction of Semivolatile Analytes

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1、METHOD3542EXTRACTIONOFSEMIVOLATILEANALYTESCOLLECTEDUSINGMETHOD0010(MODIFIEDMETHOD5SAMPLINGTRAIN)1.0SCOPEANDAPPLICATION1.1ThismethoddescribestheextractionofsemivolatileorganiccompoundsfromsamplescollectedbyMethod0010.ThismethodreplacesSection8.1ofMethod0010(ModifiedMethod5SamplingTrai

2、n,alsoknownasSemiVOST).Section8.1ofMethod0010addressespreparationofMethod0010traincomponentsforanalysiswithverylittledetail.1.2Althoughthissamplepreparationtechniqueisintendedprimarilyforgaschromatography/massspectrometric(GC/MS)analysisfollowingMethod8270,theextractspreparedaccordin

3、gtothismethodmaybeusedwithotheranalyticalmethods.TheMethod0010samplingtraincollectssemivolatileorganiccompoundswithboilingpointsabove100EC.Someofthesesemivolatileorganiccompoundsmaynotbeamenabletogaschromatographyandwillrequiretheapplicationofhighperformanceliquidchromatography(HPLC)

4、forquantitativeanalysis.TheuseofHPLCcoupledwithmassspectrometry(HPLC/MS)isananalyticaltechniquethatmayalsobeapplied.Asolventexchangefrommethylenechloridetoamorepolarsolventsuchasacetonitrileorextractionwithasolventotherthanmethylenechloridewillprobablyberequiredforsuccessfulapplicati

5、onofHPLCtechniques.SomesemivolatileanalytesmayrequirederivatizationforsuccessfulGC/MSanalysis.1.3ThismethodisrestrictedtousebyorunderthesupervisionofanalystsexperiencedintheextractionandconcentrationofsemivolatileorganiccompoundsfromthecomponentsofMethod0010trains.Eachanalystmustdemo

6、nstratetheabilitytogenerateacceptableresultswiththismethod.2.0SUMMARYOFMETHOD2.1SamplesgeneratedbytheMethod0010SamplingTrain(Method0010SamplingTrain,Figure1)areseparatedintosixparts:a)aparticulatematterfilter(labeledinMethod0010asContainerNo.1);b)afronthalfrinse(labeledinMethod0010as

7、ContainerNo.2);c)condenserrinseandrinseofallsamplingtraincomponentslocatedbetweenthefilterandthesorbentmodule(labeledinMethod0010asContainerNo.5);d)sorbenttrapsectionoftheorganicmodule(labeledinMethod0010asContainerNo.3);e)anycondensateandcondensaterinse(labeledinMethod0010asContaine

8、rNo.4);andf)