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standard by International Organization for Standardization, 07/01/2010
ISO 11704:2010 specifies a method for the determination of gross alpha and gross beta activity in waters for radionuclides which are not volatile at 80 C. Radon isotopes and their decay products of short half life are not included in the determination.
The method is applicable to raw and potable waters with a dry residue less than 5 g/l and when no correction for colour quenching is necessary.