90.92 Standard to be revised Jun 17, 2024
ISO
ISO/TC 147/SC 3 Radioactivity measurements
International Standard
13.060.60 Examination of physical properties of water | 17.240 Radiation measurements
This document specifies the measurement method for the determination of total activity concentration of uranium isotopes in non-saline waters by extraction and liquid scintillation counting.
This method covers the measurement of soluble uranium isotopes in water in activity concentrations between approximately 2·10−3 Bq/kg and 10 Bq/kg when analysing a 1 l test sample volume with a 60 000 s counting time with a typical alpha LSC instrument.
The ratio 234U/238U can also be determined. This method has not been tested for the measurement of other uranium isotopes.
PUBLISHED
ISO 13169:2018
90.92
Standard to be revised
Jun 17, 2024
IN_DEVELOPMENT
ISO/CD 13169