Designation:C1000−11StandardTestMethodforRadiochemicalDeterminationofUraniumIsotopesinSoilbyAlphaSpectrometry1ThisstandardisissuedunderthefixeddesignationC1000;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofalpha-emittinguraniumisotopesinsoil.Thistestmethoddescribesoneacceptableapproachtothedeterminationofuraniumisotopesinsoil.21.2Thetestmethodisdesignedtoanalyze10gofsoil;however,thesamplesizemaybevariedto50gdependingontheactivitylevel.Thistestmethodmaynotbeabletocompletelydissolveallformsofuraniuminthesoilmatrix.Studieshaveindicatedthattheuseofhydrofluoricacidtodissolvesoilhasresultedinlowervaluesthanresultsusingtotaldissolutionbyfusion.1.3Thelowerlimitofdetectionisdependentoncounttime,samplesize,detector,background,andtraceryield.Thechemicalyieldaveraged78%inasinglelaboratoryevaluation,and66%inaninterlaboratorycollaborativestudy.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Aspecificprecau-tionarystatementisgiveninSection10.2.ReferencedDocuments2.1ASTMStandards:3C859TerminologyRelatingtoNuclearMaterialsC998PracticeforSamplingSurfaceSoilforRadionuclidesC999PracticeforSoilSamplePreparationfortheDetermi-nationofRadionuclidesC1163PracticeforMountingActinidesforAlphaSpectrom-etryUsingNeodymiumFluorideC1284PracticeforElectrodepositionoftheActinidesforAlphaSpectrometryD1193SpecificationforReagentWaterD3084PracticeforAlpha-ParticleSpectrometryofWaterD3648PracticesfortheMeasurementofRadioactivityD7282PracticeforSet-up,Calib...
