NF EN ISO 22515

NF EN ISO 22515

June 2021
Standard Current

Water quality - Iron-55 - Test method using liquid scintillation counting

This document specifies a test method for the determination of iron-55 (55Fe) activity concentration in samples of all types of water using liquid scintillation counting (LSC). Using currently available liquid scintillation counters, this test method can measure the 55Fe activity concentrations in the range from the limit of detection up to 120 mBq l-1. These values can be achieved with a counting time between 7 200 s and 10 800 s for a sample volume from 0,5 l to 1,5 l. Higher activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both.NOTE      These performance indicators are wholly dependent on the measurement regimes in individual laboratories; in particular, the detection limits are influenced by amount of stable iron present.The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and counting efficiency).It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2021

Number of pages

33 p.

Reference

NF EN ISO 22515

ICS Codes

13.060.60   Examination of physical properties of water
17.240   Radiation measurements
27.120.01   Nuclear energy in general

Classification index

M60-837

Print number

1

International kinship

ISO 22515

European kinship

EN ISO 22515
Sumary
Water quality - Iron-55 - Test method using liquid scintillation counting

This document specifies a test method for the determination of iron-55 (55Fe) activity concentration in samples of all types of water using liquid scintillation counting (LSC). Using currently available liquid scintillation counters, this test method can measure the 55Fe activity concentrations in the range from the limit of detection up to 120 mBq l-1. These values can be achieved with a counting time between 7 200 s and 10 800 s for a sample volume from 0,5 l to 1,5 l. Higher activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both.

NOTE      These performance indicators are wholly dependent on the measurement regimes in individual laboratories; in particular, the detection limits are influenced by amount of stable iron present.

The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and counting efficiency).

It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions, symboles et unités
  • 4 Principe
  • 5 Réactifs
  • 6 Équipements
  • 7 Échantillonnage et préparation des échantillons
  • 8 Mise en place et étalonnage des scintillations en milieu liquide
  • 9 Mode opératoire
  • 10 Contrôle qualité
  • 11 Expression des résultats
  • 12 Rapport d'essai
  • Annexe A (informative) Isolement et purification du fer
  • Annexe B (informative) Schéma d'analyse
  • Bibliographie
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