ISO - 13164-4
Water quality — Radon-222 — Part 4: Test method using two-phase liquid scintillation counting
Organization: | ISO |
Publication Date: | 1 July 2023 |
Status: | active |
Page Count: | 24 |
ICS Code (Examination of physical properties of water): | 13.060.60 |
ICS Code (Radiation protection): | 13.280 |
ICS Code (Radiation measurements): | 17.240 |
scope:
This document describes a test method for the determination of radon-222 (222Rn) activity concentration in non-saline waters by extraction and liquid scintillation counting.
The 222Rn activity concentrations, which can be measured by this test method utilizing currently available instruments, are above 0,5 Bq·l−1 which is the typical detection limit for a 10 ml test sample and a measuring time of 1 h.
It is the responsibility of the laboratory to ensure the validity of this test method for water samples of untested matrices.
Annex A gives indication on the necessary counting conditions to meet the required detection limits for drinking water monitoring.