ASTM D7939-15
(Test Method)Standard Test Method for Rapid Radiochemical Determination of Americium-241 in Water (Withdrawn 2024)
Standard Test Method for Rapid Radiochemical Determination of Americium-241 in Water (Withdrawn 2024)
SIGNIFICANCE AND USE
5.1 This test method is considered a rapid method when compared to other classical methods for the determination of 241Am in aqueous solutions. During the method validation of this method, a test batch of fourteen test samples plus quality control samples was chemically processed in ~7.5 hours. Additional time for counting the samples depends on the measurement quality objectives.
5.2 This test method is specific for Americium-241 (241Am) in drinking water and other aqueous samples. However, if any isotopes of curium are present in the sample, they will be carried with americium during the analytical separation process and will be observed in the final alpha spectrum.
5.3 This test method is capable of achieving a required method uncertainty for 241Am of 0.070 Bq/L at an analytical action level of 0.555 Bq/L. This test method is capable of achieving a required relative method uncertainty, φMR, 13 % above 0.555 Bq/L. This test method is capable of achieving a “required” minimum detectable concentration (MDC) of 0.055 Bq/L.
5.4 To attain these stated measurement quality objectives (MQOs), a sample volume of approximately 200 mL and count time of at least 1 to 3 hours are recommended. The sample turnaround time and throughput may vary based on additional project MQOs, the time for analysis of the final counting form, and initial sample volume. This test method should be validated before use following the protocols provided in Method Validation Guide for Qualifying Methods Used by Radiological Laboratories Participating in Incident Response Activities.4
5.5 This test method is intended to be used for water samples that are similar in composition to drinking water. This method was evaluated following the guidance presented for “Level E Method Validation: Adapted or Newly Developed Methods, Including Rapid Methods” in Method Validation Guide for Qualifying Methods Used by Radiological Laboratories Participating in Incident Response Activities and Chapter 6 of ...
SCOPE
1.1 This test method is specifically for Americium-241 (241Am) in drinking water and other aqueous samples. However, if any isotopes of curium are present in the sample, they will be carried with americium during the analytical separation process and will be observed in the final alpha spectrum. The presence of 243Am in the water sample will bias the results obtained by this test method.
1.2 This test method is applicable to samples in which radioactive contamination is from either known or unknown origins. If any filtration of the sample is performed before starting the analysis, those solids should be analyzed separately. The results from the analysis of these solids should be reported separately (as a suspended activity concentration for the water volume filtered) but identified with the filtrate results.
1.3 This test method is applicable to the determination of soluble 241Am. This test method is not applicable to the determination of 241Am in highly insoluble particulate matter possibly present in water samples contaminated as a result of a radiological dispersal device (RDD) event.
1.4 This test method uses rapid radiochemical separation techniques for determining americium in water samples following a radiological or nuclear incident. Although, with this test method, concentrations of 241Am on the same order of magnitude as methods used for the Safe Drinking Water Act (SDWA) can be detected, this test method is not a substitute for SDWA-approved methods for 241Am.
1.5 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7939 − 15
Standard Test Method for
Rapid Radiochemical Determination of Americium-241 in
1
Water
This standard is issued under the fixed designation D7939; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method is specifically for Americium-241
241 ization established in the Decision on Principles for the
( Am) in drinking water and other aqueous samples.
Development of International Standards, Guides and Recom-
However, if any isotopes of curium are present in the sample,
mendations issued by the World Trade Organization Technical
they will be carried with americium during the analytical
Barriers to Trade (TBT) Committee.
separation process and will be observed in the final alpha
243
spectrum.Thepresenceof Aminthewatersamplewillbias
2. Referenced Documents
the results obtained by this test method.
2
2.1 ASTM Standards:
1.2 This test method is applicable to samples in which
C1163PracticeforMountingActinidesforAlphaSpectrom-
radioactive contamination is from either known or unknown
etry Using Neodymium Fluoride
origins. If any filtration of the sample is performed before
C1284Practice for Electrodeposition of the Actinides for
starting the analysis, those solids should be analyzed sepa-
Alpha Spectrometry
rately. The results from the analysis of these solids should be
D1129Terminology Relating to Water
reported separately (as a suspended activity concentration for
D1193Specification for Reagent Water
thewatervolumefiltered)butidentifiedwiththefiltrateresults.
D3370Practices for Sampling Water from Closed Conduits
1.3 This test method is applicable to the determination of
D4448GuideforSamplingGround-WaterMonitoringWells
241
soluble Am. This test method is not applicable to the
D5847Practice for Writing Quality Control Specifications
241
determination of Am in highly insoluble particulate matter
for Standard Test Methods for Water Analysis
possiblypresentinwatersamplescontaminatedasaresultofa
D6001Guide for Direct-Push Groundwater Sampling for
radiological dispersal device (RDD) event.
Environmental Site Characterization
D7282Practice for Set-up, Calibration, and Quality Control
1.4 This test method uses rapid radiochemical separation
of Instruments Used for Radioactivity Measurements
techniques for determining americium in water samples fol-
lowing a radiological or nuclear incident. Although, with this
241
3. Terminology
test method, concentrations of Am on the same order of
magnitude as methods used for the Safe Drinking Water Act
3.1 Definitions—For definitions of terms used in this test
(SDWA)canbedetected,thistestmethodisnotasubstitutefor
method, refer to Terminology D1129.
241
SDWA-approved methods for Am.
3.2 Definitions of Terms Specific to This Standard:
1.5 Units—The values stated in SI units are to be regarded
3.2.1 analytical action level, AAL, n—denotesthevalueofa
as the standard. No other units of measurement are included in
quantity that will cause the decision maker to choose an
this standard.
alternative action.
1.6 This standard does not purport to address all of the
3.2.2 analytical protocol specifications, APS, n—outputofa
safety concerns, if any, associated with its use. It is the
directed planning process that contains the project’s analytical
responsibility of the user of this standard to establish appro-
data needs and requirements in an organized, concise form.
priate safety, health, and environmental practices and deter-
3.2.3 discrete radioactive particles, DRPs or hot particles,
mine the applicability of regulatory limitations prior to use.
n—particulatematterinasampleofanymatrixinwhichahigh
1
This test method is under the jurisdiction ofASTM Committee D19 on Water
2
andisthedirectresponsibilityofSubcommitteeD19.04onMethodsofRadiochemi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cal Analysis. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Jan. 1, 2015. Published January 2015. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D7939-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7939 − 15
concentration of radioac
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7939 − 15
Standard Test Method for
Rapid Radiochemical Determination of Americium-241 in
1
Water
This standard is issued under the fixed designation D7939; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method is specifically for Americium-241
241 ization established in the Decision on Principles for the
( Am) in drinking water and other aqueous samples.
Development of International Standards, Guides and Recom-
However, if any isotopes of curium are present in the sample,
mendations issued by the World Trade Organization Technical
they will be carried with americium during the analytical
Barriers to Trade (TBT) Committee.
separation process and will be observed in the final alpha
243
spectrum. The presence of Am in the water sample will bias
2. Referenced Documents
the results obtained by this test method.
2
2.1 ASTM Standards:
1.2 This test method is applicable to samples in which
C1163 Practice for Mounting Actinides for Alpha Spectrom-
radioactive contamination is from either known or unknown
etry Using Neodymium Fluoride
origins. If any filtration of the sample is performed before
C1284 Practice for Electrodeposition of the Actinides for
starting the analysis, those solids should be analyzed sepa-
Alpha Spectrometry
rately. The results from the analysis of these solids should be
D1129 Terminology Relating to Water
reported separately (as a suspended activity concentration for
D1193 Specification for Reagent Water
the water volume filtered) but identified with the filtrate results.
D3370 Practices for Sampling Water from Closed Conduits
1.3 This test method is applicable to the determination of
D4448 Guide for Sampling Ground-Water Monitoring Wells
241
soluble Am. This test method is not applicable to the
D5847 Practice for Writing Quality Control Specifications
241
determination of Am in highly insoluble particulate matter
for Standard Test Methods for Water Analysis
possibly present in water samples contaminated as a result of a
D6001 Guide for Direct-Push Groundwater Sampling for
radiological dispersal device (RDD) event.
Environmental Site Characterization
D7282 Practice for Set-up, Calibration, and Quality Control
1.4 This test method uses rapid radiochemical separation
of Instruments Used for Radioactivity Measurements
techniques for determining americium in water samples fol-
lowing a radiological or nuclear incident. Although, with this
241
3. Terminology
test method, concentrations of Am on the same order of
magnitude as methods used for the Safe Drinking Water Act
3.1 Definitions—For definitions of terms used in this test
(SDWA) can be detected, this test method is not a substitute for
method, refer to Terminology D1129.
241
SDWA-approved methods for Am.
3.2 Definitions of Terms Specific to This Standard:
1.5 Units—The values stated in SI units are to be regarded
3.2.1 analytical action level, AAL, n—denotes the value of a
as the standard. No other units of measurement are included in
quantity that will cause the decision maker to choose an
this standard.
alternative action.
1.6 This standard does not purport to address all of the
3.2.2 analytical protocol specifications, APS, n—output of a
safety concerns, if any, associated with its use. It is the
directed planning process that contains the project’s analytical
responsibility of the user of this standard to establish appro-
data needs and requirements in an organized, concise form.
priate safety, health, and environmental practices and deter-
3.2.3 discrete radioactive particles, DRPs or hot particles,
mine the applicability of regulatory limitations prior to use.
n—particulate matter in a sample of any matrix in which a high
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
2
and is the direct responsibility of Subcommittee D19.04 on Methods of Radiochemi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cal Analysis. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Jan. 1, 2015. Published January 2015. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D7939-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7939 − 15
concentration of radioactive material is contained in a tiny test method use
...
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