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Standards [CURRENT]

Water quality - Determination of tritium activity concentration - Liquid scintillation counting method (ISO 9698:2010); German version EN ISO 9698:2015

Title (German)

Wasserbeschaffenheit - Bestimmung der Aktivitätskonzentration von Tritium - Verfahren mit dem Flüssigszintillationszähler (ISO 9698:2010); Deutsche Fassung EN ISO 9698:2015


This International Standard specifies a method by liquid scintillation counting for the determination of tritium activity concentration in samples of marine waters, surface waters, ground waters, rain waters, drinking waters or of titrated water ([(3H]H2O) in effluents. 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 in Annexes B, D and E. This method is not applicable to the analysis of organically bound tritium. This determination requires additional chemical processing of the sample (such as chemical oxidation or combustion). With suitable technical conditions, the detection limit is as low as 106 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. The text of ISO 9698:2010 has been prepared by Technical Committee ISO/TC 147 "Water quality" of the International Organization of Standardization (ISO) and been adopted as EN ISO 9698:2015 by Technical Committee CEN/TC 230 "Water Analysis", the secretariat of which is held by DIN (Germany). The responsible German committee is NA 119-01-03 AA "Wasseruntersuchung" ("Water examination") at DIN Standards Committee Water Practice(NAW).

Document: references other documents

Responsible national committee

NA 119-01-03-08 UA - Radioactivity measurements in waters  

Responsible european committee

CEN/TC 230 - Water analysis  

Responsible international committee

ISO/TC 147/SC 3 - Radioactivity measurements  

Edition 2015-12
Original language German
Translation English
Price from 99.10 €
Table of contents


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