STANDARD
ISO 9698:2010
Issue date: 2010 12 10
Water quality — Determination of tritium activity concentration — Liquid scintillation counting method
ISO 9698:2010 specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water 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.
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. Three distillation procedures are described.
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.
General information on ISO 9698:2010
Timeline
An overview of the development of ISO 9698:2010 from 1989 til today.
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ISO 9698:20192019 04 30 Standard ISO 9698:2019, Edition: 2019 04 30Water quality — Tritium — Test method using liquid scintillation counting
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ISO 9698:20102010 12 10 Standard ISO 9698:2010, Edition: 2010 12 10Water quality — Determination of tritium activity concentration — Liquid scintillation counting meth...
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ISO 9698:19891989 12 07 Standard ISO 9698:1989, Edition: 1989 12 07Water quality — Determination of tritium activity concentration — Liquid scintillation counting meth...
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