WPCF 績2<>UN8M3^0U9m]+|R4HAs 7 0 wF@h^KxxEvG"? QTJc%q19P#1ƍ0L- cM:u r"nV/ИLZ10x\_$UD!ۤAEj6x?Xɩs"L{Ecs'>%v-Oڔ-Q| efGIF;n2%)49"bocǭdW>2ƾRD P#O@D* D{)7nU.Pzyj^>ȊfLNs%U Hm6ö `hdibD"܏ozo0^sЍɿVgFїL0sLU j #UNy % 0:N^ w4- m/#|xHP LaserJet 2200 Series PCL 60(9 Z6Times New Roman RegularX($USUS.,jm- V,o ToolU !USUS.,  _TITLE  FieldValidationofthe_DNPH_ԀMethodforAldehydesand_Ketones_  AUTHOR(S) t GeraldS.Workman,Jr.and_Joette_ԀL._Steger_ ` PERFORMINGORGANIZATIONNAMEANDADDRESS 8  RadianCorporation $ t P.O.Box13000  ` ResearchTrianglePark,NC27709  L  SPONSORINGAGENCYNAMEANDADDRESS   NationalExposureResearchLaboratory   OfficeofResearchandDevelopment   U.S.EnvironmentalProtectionAgency   ResearchTrianglePark,NC27711 p ABSTRACT H Astationarysourceemissiontestmethodforselectedaldehydesand 4 _ketones_Ԁhasbeenvalidated.Themethodemploysasamplingtrain  p with_impingers_Ԁcontaining2,4-_dinitrophenylhydrazine_Ԁ(_DNPH_)to  \ _derivatize_Ԁthe_analytes_.Theresulting_hydrazones_Ԁarerecovered H andanalyzedbyhighperformanceliquidchromatography.Nine 4 _analytes_Ԁwerestudied:formaldehyde,acetaldehyde,_propionaldehyde_,   methylethylketone,methyl_isobutyl_Ԁketone,_acetophenone_,   _isophorone_,and_quinone_.Thestudyemployedthevalidation  techniquesdescribedinEPAmethod301,whichusestrainspikingto  determinebias,andcollocatedsamplingtrainstodetermine  precision.Thestudieswerecarriedoutataplywoodveneerdryer l andapolyestermanufacturingplant. X  OnthebasisoftheMethod301criteriaforprecision(50% 0"  relativestandarddeviation)andbias(correctionfactorof1.00 #l! 0.30)themethodwasvalidatedforformaldehyde,acetaldehyde, $X" _propionaldehyde_,_acetophenone_Ԁand_isophorone_._Acrolein_,methyl $D # ethylketone,methyl_isobutyl_Ԁketone,and_quinone_Ԁdidnotmeetthe %0!$ validationcriteria. &"%