Reference number
ISO 13164-4:2023
ISO 13164-4:2023
© ISO 2025
International Standard
ISO 13164-4:2023
Water quality — Radon-222 — Part 4: Test method using two-phase liquid scintillation counting
Edition 2
2023-07
2023-07
Abstract
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.
Life cycle
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Previously
WithdrawnISO 13164-4:2015
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Now