WARNING — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.

IMPORTANT — It is absolutely essential that tests conducted in accordance with this document be carried out by suitably qualified staff.

This part of ISO 13164 specifies a test method for the determination of radon-222 activity concentration in a sample of water following the measurement of its short-lived decay products by direct gamma-spectrometry of the water sample (see Annex A).

The radon-222 activity concentrations, which can be measured by this test method utilizing currently available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand becquerels per litre for a 1 l test sample.

This test method can be used successfully with drinking water samples. The laboratory is responsible for ensuring the validity of this test method for water samples of untested matrices.

Annex B gives indication on the necessary counting conditions to meet the required sensitivity for drinking water monitoring.

Cross References:
IEC 61151
IEC 17025
ISO 13164-1
ISO 5667-1
IEC 60973
ISO 10703
IEC 61452
ISO 80000-10
ISO 5667-3
GUM:1995
ISO 11929
ISO 11665-5
IEC Guide 98-3:2008
ISO 11665-1


Incorporates the following:
Corrigendum, March 2020