ISO 13165-1:2013 specifies the determination of radium-226 (226Ra) activity concentration in non-saline water samples by extraction of its daughter radon-222 (222Rn) and its measurement using liquid scintillation counting. Radium-226 activity concentrations which can be measured by this test method utilizing currently available liquid scintillation counters goes down to 50 mBq l−1. This method is not applicable to the measurement of other radium isotopes.
EN ISO 13165-1:2020 history
2024EN ISO 13165-1:2024 Water quality - Radium-226 - Part 1: Test method using liquid scintillation counting (ISO 13165-1:2022)
2020EN ISO 13165-1:2020 Water quality - Radium-226 - Part 1: Test method using liquid scintillation counting (ISO 13165-1:2013)