BS EN ISO 13165-2:2020

1   Scope This part of ISO 13165 specifies the determination of radium-226 ( 226 Ra) activity concentration in all types of water by emanometry. The method specified is suitable for the determination of the soluble, suspended, and total 226 Ra activity concentration in all types of water with soluble 226 Ra activity concentrations greater than 0,02 Bq l −1 . In water containing high activity concentrations of 228 Th, interference from 220 Rn decay products can lead to overestimation of measured levels (see Figure A.2).