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ASTM D8293-19

(Guide)

Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical Measurements

Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical Measurements

SIGNIFICANCE AND USE
5.1 This guide is intended to help testing laboratories and the developers of methods and software for those laboratories to apply the concepts of measurement uncertainty to radiochemical analyses.  
5.2 The result of a laboratory measurement never exactly equals the true value of the measurand. The difference between the two is called the error of the measurement. An estimate of the possible magnitude of this error is called the uncertainty of the measurement. While the error is primarily a theoretical concept, since its value is never known, the uncertainty has practical uses. Together, the measured value and its uncertainty allow one to place bounds on the likely true value of the measurand.  
5.3 Reliable measurement-based decision making requires not only measured values but also an indication of their uncertainty. Traditionally, significant figures have been used with varying degrees of success to indicate implicitly the order of magnitude of measurement uncertainties; however, reporting an explicit uncertainty estimate with each result is more reliable and informative, and is considered an industry-standard best practice.
SCOPE
1.1 This guide provides concepts, terminology, symbols, and recommendations for the evaluation and expression of the uncertainty of radiochemical measurements of water and other environmental media by testing laboratories. It applies to measurements of radionuclide activities, including gross activities, regardless of whether they involve chemical preparation of the samples.  
1.2 This guide does not provide a complete tutorial on measurement uncertainty. Interested readers should refer to the documents listed in Section 2 and References for more information. See, for example, GUM, QUAM, Taylor and Kuyatt (1)2, and Chapter 19 of MARLAP (2).  
1.3 The system of units for this guide is not specified. Dimensional quantities in the guide are presented only as illustrations of calculation methods. The examples are not binding on products or test methods treated.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

General Information

Status
Historical
Publication Date
14-Nov-2019
ICS
07.030 - Physics. Chemistry
71.040.40 - Chemical analysis
Technical Committee
D19 - Water
Drafting Committee
D19.04 - Methods of Radiochemical Analysis
Current Stage
Ref Project

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ASTM D8293-19 - Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical MeasurementsASTM D8293-19 - Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical Measurements
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ASTM D8293-19 - Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical Measurements
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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: D8293 − 19
Standard Guide for
Evaluating and Expressing the Uncertainty of
1
Radiochemical Measurements
This standard is issued under the fixed designation D8293; 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 D7902 Terminology for Radiochemical Analyses
E177 Practice for Use of the Terms Precision and Bias in
1.1 This guide provides concepts, terminology, symbols,
ASTM Test Methods
and recommendations for the evaluation and expression of the
E288 Specification for Laboratory Glass Volumetric Flasks
uncertainty of radiochemical measurements of water and other
E438 Specification for Glasses in Laboratory Apparatus
environmental media by testing laboratories. It applies to
E456 Terminology Relating to Quality and Statistics
measurements of radionuclide activities, including gross
activities, regardless of whether they involve chemical prepa- E542 Practice for Calibration of Laboratory Volumetric
ration of the samples. Apparatus
E617 Specification for Laboratory Weights and Precision
1.2 This guide does not provide a complete tutorial on
Mass Standards
measurement uncertainty. Interested readers should refer to the
E898 Practice for Calibration of Non-Automatic Weighing
documents listed in Section 2 and References for more
Instruments
information. See, for example, GUM, QUAM, Taylor and
2
E969 Specification for Glass Volumetric (Transfer) Pipets
Kuyatt (1) , and Chapter 19 of MARLAP (2).
E1272 Specification for Laboratory Glass Graduated Cylin-
1.3 The system of units for this guide is not specified.
ders
Dimensional quantities in the guide are presented only as
E2655 Guide for Reporting Uncertainty of Test Results and
illustrations of calculation methods. The examples are not
Use of the Term Measurement Uncertainty in ASTM Test
binding on products or test methods treated.
Methods
1.4 This standard does not purport to address all of the
4
2.2 ANSI Standards:
safety concerns, if any, associated with its use. It is the
ANSI N42.23 Measurement and Associated Instrumentation
responsibility of the user of this standard to establish appro-
Quality Assurance for Radioassay Laboratories
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
2.3 BIPM Documents:
1.5 This international standard was developed in accor-
GUM: JCGM 100:2008 Evaluation of measurement data—
dance with internationally recognized principles on standard-
5
Guide to the expression of uncertainty in measurement
ization established in the Decision on Principles for the
JCGM 101:2008 Evaluation of measurement data—
Development of International Standards, Guides and Recom-
Supplement 1 to the “Guide to the expression of uncer-
mendations issued by the World Trade Organization Technical
tainty in measurement”—Propagation of distributions us-
Barriers to Trade (TBT) Committee.
6
ing a Monte Carlo method
2. Referenced Documents
JCGM 102:2011 Evaluation of measurement data—
3
Supplement 2 to the “Guide to the expression of uncer-
2.1 ASTM Standards:
tainty in measurement”—Extension to any number of
D1129 Terminology Relating to Water
7
quantities
1
This guide is under the jurisdiction of ASTM Committee D19 on Water and is
the direct responsibility of Subcommittee D19.04 on Methods of Radiochemical
Analysis.
4
Current edition approved Nov. 15, 2019. Published December 2020. DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D8293-19. 4th Floor, New York, NY 10036, http://www.ansi.org.
2 5
The boldface numbers in parentheses refer to the list of references at the end of Available from www.bipm.org/utils/common/documents/jcgm/JCGM_100_
this standard. 2008_E.pdf, accessed June 2018.
3 6
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from www.bipm.org/utils/common/documents/jcgm/JCGM_101_
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 2008_E.pdf, accessed June 2018.
7
Standards volume information, refer to the standard’s Document Summary page on Available from www.bipm.org/utils/common/documents/jcgm/JCGM_102_
the ASTM website. 2011_E.pdf, accessed June 2018.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8293 − 19
JCGM 200:2008 International vocabulary of metrology— rounding rules, and shorthand formats for expressing uncer-
8
Basic and general concepts and associated terms (VIM)
tainty. Guidelines for determining the practical si
...

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