90.92 Standard to be revised Nov 23, 2021
ISO
ISO/TC 147/SC 3 Radioactivity measurements
International Standard
13.060.60 Examination of physical properties of water | 17.240 Radiation measurements
ISO 13165-3:2016 specifies the determination of radium-226 (226Ra) activity concentration in all types of water by coprecipitation followed by gamma-spectrometry (see ISO 18589‑3).
The method described is suitable for determination of soluble 226Ra activity concentrations greater than 0,02 Bq l−1 using a sample volume of 1 l to 100 l of any water type.
For water samples smaller than a volume of 1 l, direct gamma-spectrometry can be performed following ISO 10703 with a higher detection limit.
NOTE This test method also allows other isotopes of radium, 223Ra, 224Ra, and 228Ra, to be determined.
PUBLISHED
ISO 13165-3:2016
90.92
Standard to be revised
Nov 23, 2021
IN_DEVELOPMENT
ISO 13165-3