ISO 22908:2020

Water quality — Radium 226 and Radium 228 — Test method using liquid scintillation counting

This document specifies the determination of radium-226 (²²⁶Ra) and radium-228 (²²⁸Ra) activity concentrations in drinking water samples by chemical separation of radium and its measurement using liquid scintillation counting.

Massic activity concentrations of ²²⁶Ra and ²²⁸Ra which can be measured by this test method utilizing currently available liquid scintillation counters go down to 0,01 Bq/kg for ²²⁶Ra and 0,06 Bq/kg for ²²⁸Ra for a 0,5 kg sample mass and a 1 h counting time in a low background liquid scintillation counter^[8].

The test method can be used for the fast detection of contamination of drinking water by radium in emergency situations.

Edition	2020
Published Date	2020
Published By	International Standardization Organisation
Page Count	28