ISO 9698:2010
Water quality - Determination of tritium activity concentration - Liquid scintillation counting method
- Standard No.
- ISO 9698:2010
- Release Date
- 2010
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 9698:2019
- Latest
- ISO 9698:2019
- Scope
- WARNING — This International Standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. IMPORTANT — It is absolutely essential that tests conducted according to this International Standard be carried out by suitably trained staff. This International Standard specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water ([3H]H2O) using liquid scintillation counting. The choice of the analytical procedure, either with or without distillation of the water sample prior to determination, depends on the aim of the measurement and the sample characteristics (see References). Direct measurement of a raw water sample using liquid scintillation counting has to consider the potential presence of other beta emitter radionuclides. To avoid interference with these radionuclides when they are detected, the quantification of tritium will be performed following the sample treatment by distillation (see References). Three distillation procedures are described in Annexes B, D and E. The method is not applicable to the analysis of organically bound tritium; its determination requires additional chemical processing (such as chemical oxidation or combustion). With suitable technical conditions, the detection limit may be as low as 1 Bq l−1. Tritium activity concentrations below 106 Bq l−1 can be determined without any sample dilution. A prior enrichment step can significantly lower the limit of detection (see References).
ISO 9698:2010 Referenced Document
- ISO 5667-1 Water quality — Sampling — Part 1: Guidance on the design of sampling programmes and sampling techniques*， 2023-03-14 Update
- ISO 5667-3 Water quality*， 2024-02-01 Update
- ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]*， 2017-11-01 Update
- ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
- ISO/IEC Guide 99:2007 International vocabulary of metrology - Basic and general concepts and associated terms (VIM)
ISO 9698:2010 history
- 2019 ISO 9698:2019 Water quality — Tritium — Test method using liquid scintillation counting
- 2010 ISO 9698:2010 Water quality - Determination of tritium activity concentration - Liquid scintillation counting method
- 1989 ISO 9698:1989 Water quality; determination of tritium activity concentration; liquid scintillation counting method
