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ISO 4722-1:2023

Water quality — Thorium 232 — Part 1: Test method using alpha spectrometry ISO 4722-1:2023

Publication date:   Oct 16, 2023

General information

60.60 Standard published   Oct 16, 2023

ISO

ISO/TC 147/SC 3 Radioactivity measurements

International Standard

13.060.60   Examination of physical properties of water | 17.240   Radiation measurements

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Scope

This document specifies the method and the conditions for the determination of 232Th activity concentration in samples of environmental water (including sea waters) and waste waters before release to the environment using alpha spectrometry and 229Th as a recovery tracer. A chemical separation allows to separate and purify thorium from a test portion of the sample.
The general principles outlined in this document can be applied for the analysis of other alpha-emitting thorium isotopes such as 228Th and 230Th in aqueous samples.

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PUBLISHED
ISO 4722-1:2023
60.60 Standard published
Oct 16, 2023