ASTM D5174-23

Standard Test Method for Trace Uranium in Water by Pulsed-Laser Phosphorimetry

SIGNIFICANCE AND USE
5.1 This test method is useful for the analysis of total uranium in water following wet-ashing, as required, due to impurities or suspended materials in the water.
SCOPE
1.1 This test method covers the determination of total uranium, by mass concentration, in water within the calibrated range of the instrument, 0.1 μg/L or greater. Samples with uranium mass concentrations above the laser phosphorimeter dynamic range are diluted to bring the concentration to a measurable level.  
1.2 This test method was used successfully with reagent water. It is the user’s responsibility to ensure the validity of this test method for waters of untested matrices.  
1.3 The values stated in SI units are to be regarded as the standard.  
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: Published
• Publication Date: 31-May-2023
• ICS: 13.060.50 - Examination of water for chemical substances
• Technical Committee: D19 - Water
• Drafting Committee: D19.04 - Methods of Radiochemical Analysis

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: D5174 − 23
Standard Test Method for
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Trace Uranium in Water by Pulsed-Laser Phosphorimetry
This standard is issued under the fixed designation D5174; 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 D5847 Practice for Writing Quality Control Specifications
for Standard Test Methods for Water Analysis
1.1 This test method covers the determination of total
D6001 Guide for Direct-Push Groundwater Sampling for
uranium, by mass concentration, in water within the calibrated
Environmental Site Characterization
range of the instrument, 0.1 μg ⁄L or greater. Samples with
E131 Terminology Relating to Molecular Spectroscopy
uranium mass concentrations above the laser phosphorimeter
dynamic range are diluted to bring the concentration to a
3. Terminology
measurable level.
3.1 Definitions:
1.2 This test method was used successfully with reagent
3.1.1 For definitions of terms used in this test method, refer
water. It is the user’s responsibility to ensure the validity of this
to Terminologies D1129 and E131.
test method for waters of untested matrices.
3.1.2 For terms not defined in this test method or in
1.3 The values stated in SI units are to be regarded as the
Terminology D1129 or E131, reference may be made to other
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standard.
published glossaries.
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 This test method is based on the utilization of a laser
responsibility of the user of this standard to establish appro-
phosphorimeter to determine total uranium, by mass, in water
priate safety, health, and environmental practices and deter-
samples.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4.2 A sample aliquant is pipetted into a pretreated glass vial.
dance with internationally recognized principles on standard-
Concentrated HNO and hydrogen peroxide are added and the
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ization established in the Decision on Principles for the
sample heated to dryness. This step is repeated as necessary
Development of International Standards, Guides and Recom-
and the residue is dissolved in dilute HNO . A complexant is
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mendations issued by the World Trade Organization Technical
added to an aliquant of this sample and analyzed in the
Barriers to Trade (TBT) Committee.
phosphorimeter.
4.3 For screening purposes only, an aliquant of the sample
2. Referenced Documents
may be pipetted directly into the phosphorimeter cell contain-
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2.1 ASTM Standards:
ing uranium complexant and read. This cannot be done if the
D1129 Terminology Relating to Water
sample was preserved with HCl or if the matrix is not known.
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of
5. Significance and Use
Applicable Test Methods of Committee D19 on Water
5.1 This test method is useful for the analysis of total
D3370 Practices for Sampling Water from Flowing Process
uranium in water following wet-ashing, as required, due to
Streams
impurities or suspended materials in the water.
D4448 Guide for Sampling Ground-Water Monitoring Wells
6. Interferences
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6.1 Absorption (Inner Filter Effect)—This effect is more
This test method is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.04 on Methods of Radiochemi-
severe with ultraviolet excitation light (337 nm) than with
cal Analysis.
visible excitation because many prevalent compounds have
Current edition approved June 1, 2023. Published July 2023. Originally approved
pi-bonding and absorb strongly in this region. Ferric iron and
in 1991. Last previous edition approved in 2013 as D5174 – 07 (2013) which was
withdrawn January 2022 and reinstated in June 2023. DOI: 10.1520/D5174-23.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM See American National Standard Glossary of Terms in Nuclear Science and
Standards volume information, refer to the standard’s Document Summary page on Technology (ANSI N1.1), available from American National Standards Institute,
the ASTM website. 1430 Broadway, New York, NY 10014, www.ansi.org.
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