ISO DIS 9697

Description / Abstract: This International Standard specifies a method for the determination of gross beta activity in non-saline waters. The method covers non-volatile radionuclides with maximum beta energies 0,3 MeV. 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) may not be included in this International Standard.

The method is applicable to the analysis of raw and potable waters. The range of application depends on the amount of total soluble salts in the water and 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.