WPCF FC &)7o8 $/AYiW M@2_B2ڙ UW?QA*3_ Iy5M5 !dXt, Wqw ++lZ*q6Od"r!db0Hp::Yx<'o2ĆU5 v 2;?v`F&̠2\sz%bt(gC) 1I|5^qinRjW:hv|>܌䂂\LidYمm̈́'"W=! gD|(d.ʐWM,":a7K ޛSᩩ$~("`n%HGi{Ict^ɫT$w\kE+橯0aHZ ( #K} ';~v35k7ЂWcHƅ>mkdqXoa r #UNy % 0:N^ w4- m/#|xHP LaserJet 2200 Series PCL 60(9 Z6Times New Roman RegularX($USUS.,jm- V,ertyBarU !USUS.,  _TITLE  LaboratoryDevelopmentandFieldEvaluationofaGenericMethodfor  SamplingandAnalysisof_Isocyanates_  AUTHOR(S) ` _J.F._Ԁ_McGaughey_,S.C.Foster,and_R.G._ԀMerrill,RadianCorp._RTP_,NC L  27709;F.WilshireandJ.Knoll,_USEPA_/_NERL_/_AMRD_/MB;_RTP_,NC27711 8  PERFORMINGORGANIZATIONNAMEANDADDRESS  ` RadianCorp.  L  ResearchTrianglePark,NC27709  8  SPONSORINGAGENCYNAMEANDADDRESS   NationalExposureResearchLaboratory   U.S.EnvironmentalProtectionAgency   ResearchTrianglePark,NC27711   ABSTRACT \ TheU.S.EnvironmentalProtectionAgency,undertheauthorityof H TitleIIIoftheCleanAirActAmendmentsof1990,requiresthe 4 identificationandevaluationofasamplingandanalysismethodfor  p thefollowing_isocyanates_:methylisocyanate;_hexamethylene_Ԁ1,6-  \ _diisocyanate_;2,4-_toulene_Ԁ_diisocyanate_;andmethylene_diphenyl_ H _diisocyanate_.Alaboratorystudywasperformedtodevelopthe 4 samplingandanalysismethod.Thiseffortwasfollowedbythree   fieldvalidationtestsusingtheapproachspecifiedintheEPA   Method301protocol.Thesamplingmethodemployedwasa  modificationoftheEPAMethod5samplingprocedure,usinga  _derivatizing_Ԁagenttostabilizethe_isocyanates_Ԁforsubsequent  analysis.Sampleswereanalyzedbyhighperformanceliquid l chromatographyunderconditionsadequatetoseparateandquantify X  allfourcompounds.Themethodbias,precision,andsamplespike D! recoveries,allmettheEPAMethod301criteriaforanacceptable 0"  method,astestedatthespecifiedsourcetypes. #l!