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November1999 CollectionofOfficialMethodsunderArticle35oftheGermanFederalFoodAct AnalysisofFoodstuffs00.00 LModularMultipleAnalyticalMethodfortheDeterminationofPesticide ResiduesinFoodstuffs34 (ExtendedandRevisedVersionoftheDFGMethodS19) 1AimandscopeInaddition,thismodularformfacilitatestheintroduction ofnewandapprovedtechniquesinthefuture,e.g.the Thisofficialmethodspecifiesaprocedurefortheresidue HPLCasamoduleforcleanuporfordeterminationpur- analysisoforganochlorine,organophosphorus,nitrogen- poses. containingandotherpesticidesinfoodstuffs.Itreflects theDFGMultiresidueMethodS19initsoriginal[1]asForallthesereasons,theAnalyticalWorkingGroupof wellasinitsmodifiedversion[2]andaffordsamuchthePesticidesCommissionatBgVVpublishesherean broaderfieldofapplication.extendedversionofthelatestavailableandreliable methodology.Ittakesthementionedpointsintoaccount 2Definitionandmakesthemodularstructuretransparent.Since eachmoduleiscompletelydescribedthusavoiding Thetermpesticideresiduecontentofafoodstuffisde-complicatingcross-references,thereiterationofseveral finedasthecontentdeterminedbyusingthismethod.Ittextshadtobeaccepted. isexpressedinmg/kg. 4Sampling 3Introduction 4.1Samplingstudyplan TheMultiresidueMethodS19oftheDFGManualin- cludingtheCleanupMethod6(gelchromatographicThesamplingprocedurefortheofficialcontrolofresi- cleanup)[3]hasprovedtobeusedsuccessfullyinmanyduesofpesticidesonandinfruitandvegetableshasto laboratoriesbecauseofitsbroadapplicabilityforthegascomplywiththeprovisiongiveninL29.00-1intheGer- chromatographicdeterminationofpesticideresiduesinmanCollectionofOfficialMethods. foodstuffs.ItwasalsoincludedintotherespectiveEuro-4.2Samplepreparation peanStandards[4,5].ReferenceisgiventotherecommendationsoftheDFG Inthemeantimeamodificationoftheextractionandpar-Manual[6]andofthePesticideWorkingGroupof“Le- titionstephasbeenimplemented[2].Itrequireslessex-bensmittelchemischeGesellschaft”(GDCh)[7]. perimentaleffortsandmanageswithoutdichloromethane whichisundesirablefortoxic