Designation:D7283−17StandardTestMethodforAlphaandBetaActivityinWaterByLiquidScintillationCounting1ThisstandardisissuedunderthefixeddesignationD7283;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.2,3AcollaborativestudyfollowingtheU.S.EPA“ProtocolfortheEvaluationofAlternateTestProceduresforAnalyzingRadioactiveContaminantsinDrinkingWater”wasperformed.TheresultsofthisstudyareonfileatASTMHeadquarters.41.4ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstopCi/Lthatareprovidedforinformationonlyandarenotconsideredstandard.AnexceptionisnotedinSection14.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrad...
