ASTM_D_5811_-_20.pdf

Designation:D581120Standard Test Method forStrontium-90 in Water1This standard is issued under the fixed designation D5811;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of radioac-tive90Sr in environmental water samples(for example,non-process and effluent waters)in the range of 0.037 Bq/L(1.0pCi/L)or greater.1.2 This test method has been used successfully with tapwater.It is the users responsibility to ensure the validity of thistest method for samples larger than 1 L and for waters ofuntested matrices.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific hazard statements,see Section 9.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1890 Test Method for Beta Particle Radioactivity of WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Flowing ProcessStreamsD3648 Practices for the Measurement of RadioactivityD4448 Guide for Sampling Ground-Water Monitoring WellsD5673 Test Method for Elements in Water by InductivelyCoupled PlasmaMass SpectrometryD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisD6001 Guide for Direct-Push Groundwater Sampling forEnvironmental Site CharacterizationD7282 Practice for Set-up,Calibration,and Quality Controlof Instruments Used for Radioactivity MeasurementsD7902 Terminology for Radiochemical Analyses2.2 Other Documents:ANSI N42.22 Traceability of Radioactive Sources to theNational Institute of Standards and Technology(NIST)and Associated Instrument Quality Control3BIPM-5 Decay Data Evaluation Project(DDEP)4NUDAT253.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.3.1.2 For definitions of terms used in this standard relatingto radiochemical analysis,refer to Terminology D7902.4.Summary of Test Method4.1 This test method is based on the utilization of solidphase extraction of strontium from water samples with detec-tion of the radioactive strontium by gross beta gas proportionalcounting.4.2 An aliquant of the sample is measured into a beaker,strontium carrier added,digested with nitric acid,sorbed on anion exchange column,eluted,evaporated to dryness,dissolvedin nitric acid(8 M),selectively sorbed on a solid phaseextraction column,eluted with dilute nitric acid,dried on aplanchet.The sample test source(STS)is counted for betaradiation.4.3 Fig.1 shows a flow diagram for this test method.1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.04 on Methods of Radiochemi-cal Analysis.Current edition approved May 1,2020.Published June 2020.Originallyapproved in 1995.Last previous edition approved in 2013 as D5811 08(2013).DOI:10.1520/D5811-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,Piscataway,NJ 08854-4141,http:/www.ieee.org.4Available from BIPM,Svres Cedex,France,https:/www.bipm.org.5Available from National Nuclear Data Center at Brookhaven NationalLaboratory,W Princeton Ave,Yaphank,NY 11980,http:/www.nndc.bnl.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.5.Significance and Use5.1 This test method was developed to measure the concen-tration of90Sr in non-process water samples.This test methodmay be used to determine