ASTM D7168-21
Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk

Standard No.

ASTM D7168-21

Release Date

2021

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7168-21

Scope

1.1 This test method describes a solid phase extraction (SPE) procedure to separate 99 Tc from environmental water (non-process-related or effluent water samples). Technetium-99 beta activity is measured by liquid scintillation spectrometry. 1.2 This test method is designed to measure 99 Tc in the range of approximately 0.037 Bq/L (1.0 pCi/L) or greater for a one litre sample. 1.3 This test method has been used successfully with tap water. It is the user’s responsibility to ensure the validity of this test method for samples larger than 1 L and for waters of untested matrices. 1.4 Technetium-99 alternatively can be determined in water samples using Practice D8026. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 9. 1.7 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.

ASTM D7168-21 Referenced Document

• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
• ASTM D3370 Standard Practices for Sampling Water from Closed Conduits
• ASTM D4448 Standard Guide for Sampling Ground-Water Monitoring Wells
• ASTM D5847 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
• ASTM D6001 Standard Guide for Direct-Push Water Sampling for Geoenvironmental Investigations
• ASTM D7282 Standard Practice for Setup, Calibration, and Quality Control of Instruments Used for Radioactivity Measurements
• ASTM D7902 Standard Terminology for Radiochemical Analyses
• ASTM D8026 Standard Practice for Determination of Tc-99 in Water by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

ASTM D7168-21 history

• 2021 ASTM D7168-21 Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk
• 2016 ASTM D7168-16 Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk
• 2011 ASTM D7168-11e1 Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk
• 2011 ASTM D7168-11 Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk
• 2005 ASTM D7168-05e1 Standard Test Method for⁹⁹Tc in Water by Solid Phase Extraction Disk
• 2005 ASTM D7168-05 Standard Test Method for⁹⁹Tc in Water by Solid Phase Extraction Disk