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Water quality - Radium-226 - Part 3: Test method using coprecipitation and gamma-ray spectrometry
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STANDARD published on 1.5.2025
Designation standards: ČSN EN ISO 13165-3
Classification mark: 757619
Catalog number: 520928
Publication date standards: 1.5.2025
SKU: NS-1219554
The number of pages: 28
Approximate weight : 84 g (0.19 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
Examination of physical properties of waterRadiation measurements
This document specifies a method to determine radium-226 (226Ra) activity concentration in all types of water by coprecipitation followed by gamma-ray spectrometry (see ISO 20042[7]).
The method covers the measurement of soluble 226Ra activity concentrations greater than 0,002 Bq˙l-1 using a sample volume of up to 100 l of any water type.
For water samples with a volume of less than a volume of 1 l, direct gamma-ray spectrometry can be performed following ISO 10703 but with a higher detection limit. The typical detection limit for samples of 1 l to 5 l is in the range of 0,002 to 0,000 40 Bq˙l-1[8].
NOTE - This test method can be adapted to determine other naturally occurring isotopes of radium, such as 223Ra, 224Ra and 228Ra, if the respective ingrowth periods are taken into account
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