ASTM D7168 - 2016 Standard Test Method for 99Tc in Water by Solid Phase Extraction Disk

American Society for Testing and Materials - 2016.- 6 p.
This test method describes a solid phase extraction (SPE) procedure to separate 99Tc from environmental water (non-process-related or effluent water samples). Technetium-99 beta activity is measured by liquid scintillation spectrometry.
This test method is designed to measure 99Tc in the range of approximately 0.037 Bq/L or greater for a one litre sample.
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.
Technetium-99 alternatively can be determined in water samples using Practice D8026.
Referenced Documents
ASTM Standards:
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits D4448 Guide for Sampling Ground-Water Monitoring Well
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
D6001 Guide for Direct-Push Groundwater Sampling for Environmental Site Characterization
D7282 Practice for Set-up, Calibration, and Quality Control of Instruments Used for Radioactivity Measurements
D7902 Terminology for Radiochemical Analyses
D8026 Practice for Determination of Tc-99 in Water by Inductively Coupled Plasma Mass Spectrometry (ICP- MS)