British Standards Institution

Source:: ISO
Committee:: EH/3/8 - Radioactivity measurements methods
Categories:: Information management | Standardization. General rules | Measurement and Science | Testing | Environment | Water quality | Water quality. General | Water. Drinking | Water. Examination. General | Water quality. Other

Scope

This standard describes a method for the measurement of Thorium-232 in water samples using inductively coupled plasma mass spectrometry (ICP-MS).

The method describes direct measurement of water samples without prior separation, as well as radiochemical separation using extraction chromatography, depending on the water sample analysed and ICP-MS design.

Purpose

Thorium-232 is a naturally occurring radionuclide, with enhanced concentrations in water samples due to variations in geological conditions and certain human activities.

Enhanced activity concentrations of thorium-232 in drinking water presents a potential risk to human health. It is therefore important to monitor the thorium-232 content as part of the assessment of drinking water quality, in order to comply with international and national authority regulations. An International Standard on a test method for thorium-232 concentration in water samples is justified for test laboratories carrying out these measurements, required sometimes by national authorities, as laboratories may have to obtain a specific accreditation for radionuclide measurement in drinking water samples.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

01/06/2020

Proposal end date:

05/08/2020

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

ISO/PWI 4722-2, Water quality -- Thorium -- Part 2: Test method using ICP/MS

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