Designation:D8027−17StandardPracticeforConcentrationofSelectRadionuclidesUsingMnO2forMeasurementPurposes1ThisstandardisissuedunderthefixeddesignationD8027;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeisintendedtoprovideavarietyofap-proachesinwhichmanganeseoxide(MnO2)canbeusedtoconcentrateradionuclidesofinterestintoasmallervolumecountinggeometryorexcludeotherspeciesthatwouldother-wiseimpedesubsequentchemicalseparationstepsinanoverallradiochemicalmethod,orboth.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD7902TerminologyforRadiochemicalAnalyses3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthisstandard,refertoTerminologiesD1129andD7902.4.SummaryofPractice4.1ThesepracticesdescribedifferentprocessesthroughwhichMnO2canbeusedtoconcentratespecificradionuclidesofinterestintoasmallervolumecountinggeometryorexcludeotherspeciesthatwouldotherwiseimpedesubsequentchemi-calseparationstepsinanoverallradiochemicalmethod,orboth.4.2Publishedstudies(1-5)3haveaddressedindetailthevariousmannersinwhichhydrousmanganesedioxidescanbesynthesizedandthevarietyofcrystalformsofhydrousmanganesedioxidethatcan...
