ASTM D7168-05e1
Standard Test Method for⁹⁹Tc in Water by Solid Phase Extraction Disk

Standard No.

ASTM D7168-05e1

Release Date

2005

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7168-11

Latest

ASTM D7168-21

Scope

This method has not been evaluated for all possible matrices. Method suitability should be determined on specific waters of interest.

1.1 This test method describes a solid phase extraction (SPE) procedure to separate ⁹⁹Tc from environmental water samples (that is, non-process and effluent waters). Technetium-99 beta activity is measured by liquid scintillation spectrometry.

1.2 This test method is designed to measure ⁹⁹Tc in the range of approximately 0.037 Bq/L (1.0 pCi/L) or greater for a one litre sample.

1.3 The values stated in SI units are to be regarded as standard. Values given in parentheses are provided for information purposes only.

1.4 This 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.

1.5 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. For specific hazard statements, see Section 9.

ASTM D7168-05e1 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 D7168-05e1 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