Designation:D7283−13StandardTestMethodforAlphaandBetaActivityinWaterByLiquidScintillationCounting1ThisstandardisissuedunderthefixeddesignationD7283;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofgrossalpha-andbeta-activityconcentrationsinahomogeneouswatersample.Itisapplicabletoalphaemitterswithactivityconcentrationlevelsabove0.11Bq/L(3pCi/L)andbetaemitterswithactivityconcentrationlevelsabove0.15Bq/L(4pCi/L).Thistestmethodisnotapplicabletosamplescontain-ingradionuclidesthatarevolatileunderconditionsoftheanalysis.1.2Thistestmethodmayalsobeusedforthedirectmeasurementofgrossalpha-andbeta-activityconcentrationsinhomogeneouswatersampleswithalphaemitteractivityconcentrationlevelsabove1.8Bq/L(50pCi/L)andbetaemitteractivityconcentrationlevelsabove3.7Bq/L(100pCi/L).1.3Thistestmethodwastestedusingsingle-operatortests.2,31.4StandardmethodsunderthejurisdictionofASTMCom-mitteeD19maybepublishedforalimitedtimepreliminarytothecompletionoffullcollaborativestudyvalidation.SuchstandardsaredeemedtohavemetallotherD19qualifyingrequirementsbuthavenotcompletedtherequiredvalidationstudiestofullycharacterizetheperformanceoftheTestMethodacrossmultiplelaboratoriesandmatrices.Preliminarypublicationisdonetomakecurrenttechnologyaccessibletousersofstandards,andtosolicitadditionalinputfromtheusercommunity.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:4D1129TerminologyRelatingtoWaterD1125TestMethodsforElectricalCo...
