95.99 Withdrawal of Standard Jul 20, 2023
ISO
ISO/TC 147/SC 3 Radioactivity measurements
International Standard
13.060.60 Examination of physical properties of water | 17.240 Radiation measurements | 13.280 Radiation protection
ISO 13164-4:2015 describes a test method for the determination of radon-222 (222Rn) activity concentration in non-saline waters by extraction and liquid scintillation counting.
The radon-222 activity concentrations, which can be measured by this test method utilizing currently available instruments, are at least above 0,5 Bq l−1 for a 10 ml test sample and a measuring time of 1 h.
This test method can be used successfully with drinking water samples and 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.
WITHDRAWN
ISO 13164-4:2015
95.99
Withdrawal of Standard
Jul 20, 2023
PUBLISHED
ISO 13164-4:2023