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This document specifies a test method for the determination of gross beta activity concentration in non-saline waters. The method covers non-volatile radionuclides with maximum beta energies of approximately 0,3 MeV or higher. Measurement of low-energy beta emitters (e.g. 3H, 228Ra, 210Pb, 14C, 35S and 241Pu) and some gaseous or volatile radionuclides (e.g. radon and radioiodine) are not be included in the gross beta quantification using the test method described in this document.
This test method is applicable to the analysis of raw and drinking waters with low amounts of total soluble salts in the water. Limit of detection depends on the performance characteristics (background count rate and counting efficiency) of the counter used.
It is the laboratory’s responsibility to ensure the suitability of this method for the water samples tested. As this method requires sample preparation in laboratory facilities, it is not suited for rapid, in-the-field analysis.
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