Designation:D8025−16StandardTestMethodforDeterminationofSelectPesticidesinWaterbyMultipleReactionMonitoringLiquidChromatographyTandemMassSpectrometry1ThisstandardisissuedunderthefixeddesignationD8025;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisprocedurecoversamethodforanalysisofselectedpesticidesinawatermatrixbyfiltrationfollowedwithliquidchromatography/electrosprayionizationtandemmassspec-trometryanalysis.Thesamplesarepreparedin20%methanol,filtered,andanalyzedbyliquidchromatography/tandemmassspectrometry.Thismethodwasdevelopedforanagriculturalrun-offstudy,notforlowlevelanalysisofpesticidesindrinkingwater.Thismethodmaybemodifiedforlowerlevelanalysis.Theanalytesarequalitativelyandquantitativelydeterminedbythismethod.Thismethodadherestomultiplereactionmonitoring(MRM)massspectrometry.1.2AfullcollaborativestudytomeettherequirementsofPracticeD2777hasnotbeencompleted.Thisstandardcontainssingle-operatorprecisionandbiasbasedonsingle-operatordata.Publicationofstandardsthathavenotbeenfullyvalidatedisdonetomakethecurrenttechnologyaccessibletousersofstandards,andtosolicitadditionalinputfromtheusercom-munity.1.3Areportinglimitchecksample(RLCS)isanalyzedduringeverybatchtoensurethatifananalytewaspresentinasampleatornearthereportinglimititwouldbepositivelyidentifiedandaccuratelyquantitatedwithinsetqualitycontrollimits.Amethoddetectionlimit(MDL)studywasnotdoneforthismethod,themethoddetectionlimitswouldbemuchlowerthanthereportinglimitsinthismethodandwouldbeirrel-evant.ARLCSwasdeterminedtobemoreapplicableforthisstandard.IfthismethodisadaptedtoreportmuchlowerorneartheMDLthenaMDLstudywouldbewarranted.1.4Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5TheReportingRangeforthetargetanalytesarelistedin...
