ISO 9698:2019 PDF

Scope: This document 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 tritiated water ([3H]H2O) in effluents. The method is not directly applicable to the analysis of organically bound tritium; its determination requires additional chemical processing of the sample (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.

ISO 9698:2019 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