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

1. Scope

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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 Wells

D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis

D6001 Guide for Direct-Push Ground Water Sampling for Environmental Site Characterization

D7282 Practice for Set-up, Calibration, and Quality Control of Instruments Used for Radioactivity Measurements

Keywords

disc; disk; liquid scintillation counting; radioactivity; radiochemistry; solid phase extraction; technetium; water; Liquid scintillation counting; Radioactivity; Radiochemical analysis; Solid phase extraction (SPE); Technetium-99; Water analysis;

ICS Code

ICS Number Code 13.060.60 (Examination of water for physical properties)

Citing ASTM Standards

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