International Standard
ISO 13165-3:2024
Water quality — Radium-226 — Part 3: Test method using coprecipitation and gamma-ray spectrometry
Reference number
ISO 13165-3:2024
Edition 2
2024-12
© ISO 2024
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Published (Edition 2, 2024)

ISO 13165-3:2024

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Format
CHF 96
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2024-12
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 15
  • Technical Committee :
    ISO/TC 147/SC 3
    ICS :
    17.240  13.060.60 
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