Water quality. Radon-222 - Test method using emanometry Ingestion-build-44680 BS 4185-11 is a British

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Water quality. Radon-222 - Test method using emanometry Ingestion-build-44680 BS 4185-11 is a British1 Scope This part of ISO 13164 specifies a test method for the determination of radon 222 activity concentration in a sample of water following its transfer from the aqueous phase to the air phase by degassing and its detection. It gives recommendations for rapid measurements performed within less than 1 h. The radon 222 activity concentrations, which can be measured by this test method utilizing currently available instruments, range from 0,1 Bq l1