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ISO - DIS 4702

Water quality — Zirconium 93 — Test method using ICP-MS

pending, Most Current
Organization: ISO
Publication Date: 15 March 2023
Status: pending
Page Count: 23
ICS Code (Examination of physical properties of water): 13.060.60
ICS Code (Radiation measurements): 17.240
scope:

This document specifies methods used to determine 93Zr by inductively coupled plasma mass spectrometry (ICP-MS). The mass concentrations obtained can be converted into an activity concentration.

The method is applicable to test samples of drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater after proper sampling and handling, and test sample preparation.

The detection limit depends on the sample volume, the instrument used, the background count rate, the detection efficiency, the counting time, and the chemical yield. The detection limit of the method described in this document, using currently available apparatus, is approximately 90 mBq·l-1 (or mBq·kg-1), which is the same as the WHO criteria for safe consumption of drinking water (100 Bq·l-1)[4].

This method covers the measurement of 93Zr in water at activity concentrations between 0,1 Bq·l−1 and 100 Bq·l−1. Samples with higher concentrations than 100 Bq·l−1 can be measured if a dilution is performed.

The method described in this document is applicable in the event of an emergency situation.

Filtration of the test sample is necessary. The analysis of 93Zr adsorbed to suspended matter is not covered by this method. If suspended material has to be removed or analysed, filtration through a 0,45 μm filter is recommended. The analysis of the insoluble fraction requires a mineralization step that is not covered by this document. In this case, the measurement is made on the different phases obtained.

It is the user's responsibility to ensure the validity of this test method for the water samples tested.

Document History

DIS 4702
March 15, 2023
Water quality — Zirconium 93 — Test method using ICP-MS
This document specifies methods used to determine 93Zr by inductively coupled plasma mass spectrometry (ICP-MS). The mass concentrations obtained can be converted into an activity concentration. The...

References

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