Designation:D7784−20StandardPracticefortheRapidAssessmentofGamma-rayEmittingRadionuclidesinEnvironmentalMediabyGammaSpectrometry1ThisstandardisissuedunderthefixeddesignationD7784;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthequantificationofradionuclidesinenvironmentalmedia(forexample,water,soil,vegetation,food)bymeansofsimplepreparationandcountingwithahigh-resolutiongammaraydetector.Becausethepracticeisdesignedforrapidanalysis,extensiveeffortstoensurehomo-geneityoridealsamplecountingconditionsarenottaken.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C998PracticeforSamplingSurfaceSoilforRadionuclidesD1129TerminologyRelatingtoWaterD3370PracticesforSamplingWaterfromFlowingProcessStreamsD3649PracticeforHigh-ResolutionGamma-RaySpectrom-etryofWaterD7282PracticeforSet-up,Calibration,andQualityControlofInstrumentsUsedforRadioactivityMeasurementsD7902TerminologyforRadiochemicalAnalyses2.2OtherDocuments:BIPM-5DecayDataEvaluationProject(DDEP)3NUDAT243.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthisstandard,refertoTerminologiesD1129andD7902.4.Summary...
