Designation:C1310–01(Reapproved2007)StandardTestMethodforDeterminingRadionuclidesinSoilsbyInductivelyCoupledPlasma-MassSpectrometryUsingFlowInjectionPreconcentration1ThisstandardisissuedunderthefixeddesignationC1310;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedureformeasuring99Tcandaprocedureformeasuring230Thand234Uinsoils.Itisapplicabletobackgroundsoilsandsoilsthathavebeencontaminatedbynuclearprocesses.Itisintendedasanalternativetoradiochemicalmethodsbecauseitisfaster,requireslesslabor,andproduceslesswastethanmanyradio-chemicalmethods.1.2Samplesaredried,ground,dissolvedbyfusion,andanalyzedbyinductivelycoupledplasma-massspectrometry(ICP-MS).Asequentialflowinjection(FI)techniqueisusedtoprovidelowerdetectionlimitsthanthoseobtainedwithdirectaspirationintoanICP-MS,and,inthecaseof99Tc,providesseparationfrominterferences.1.3The230Thand234Uprocedurealsowouldworkfor232Th,235U,and238U,buttheFIpreconcentrationusuallyisnotrequiredtomeasuretheseisotopesattheconcentrationstypicallyfoundinsoils.1.4ThistestmethodisguidedbyqualitycontrolproceduresderivedfromU.S.EPAproceduresforinorganicanalysisreportedinSW-8462andtheContractLaboratoryProgramStatementofWork3.Therequiredlevelofqualitycontrolmayvarybetweenlaboratoriesandprojects.Laboratorystatisticalqualitycontrolproceduresarerequiredtoensurethatthistestmethodisreliable.1.5Becquerel(Bq)istheacceptablemetricunitforradio-nuclideactivity.However,picocurie(pCi)frequentlyistheunitusedtoexpressregulatorylimitsforradioactivity.Thevaluesstatedineitheroftheseunitsshallberegardedasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.1.6RefertoPracticeC998forinformationonsoilsamplecollection.1.7Thisstandard...
