ISO 13165-1:2013 Water quality - Radium-226 - Part 1: Test method using liquid scintillation counting

International Organization for Standardization – 2013.- 20 p.
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. This method is not applicable to the measurement of other radium isotopes.
ICS: 17.240 - Radiation measurements, including dosimetry