NF EN ISO 9698

NF EN ISO 9698

May 2019
Standard Current

Water quality - Tritium - Test method using liquid scintillation counting

This document specifies a method by liquid scintillation counting for the determination of tritium activity concentration in samples of marine waters, surface waters, ground waters, rain waters, drinking waters or of tritiated water ([3H]H2O) in effluents.The method is not directly applicable to the analysis of organically bound tritium; its determination requires additional chemical processing of the sample (such as chemical oxidation or combustion).With suitable technical conditions, the detection limit may be as low as 1 Bq·l−1. Tritium activity concentrations below 106 Bq·l−1 can be determined without any sample dilution.

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Main informations

Collections

National standards and national normative documents

Thematics

Sécurité, Gestion des risques et SST, QSE

Publication date

May 2019

Number of pages

35 p.

Reference

NF EN ISO 9698

ICS Codes

13.060.60   Examination of physical properties of water
13.280   Radiation protection

Classification index

M60-817

Print number

1

International kinship

ISO 9698:2019

European kinship

EN ISO 9698:2019
Sumary
Water quality - Tritium - Test method using liquid scintillation counting

This document specifies a method by liquid scintillation counting for the determination of tritium activity concentration in samples of marine waters, surface waters, ground waters, rain waters, drinking waters or of tritiated water ([3H]H2O) in effluents.

The method is not directly applicable to the analysis of organically bound tritium; its determination requires additional chemical processing of the sample (such as chemical oxidation or combustion).

With suitable technical conditions, the detection limit may be as low as 1 Bq·l−1. Tritium activity concentrations below 106 Bq·l−1 can be determined without any sample dilution.

Replaced standards (1)
NF EN ISO 9698
November 2015
Standard Cancelled
Water quality - Determination of tritium activity concentration - Liquid scintillation counting method

ISO 9698:2010 specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water using liquid scintillation counting. The choice of the analytical procedure, either with or without distillation of the water sample prior to determination, depends on the aim of the measurement and the sample characteristics. Direct measurement of a raw water sample using liquid scintillation counting has to consider the potential presence of other beta emitter radionuclides. To avoid interference with these radionuclides when they are detected, the quantification of tritium will be performed following the sample treatment by distillation. Three distillation procedures are described. The method is not applicable to the analysis of organically bound tritium; its determination requires additional chemical processing (such as chemical oxidation or combustion). With suitable technical conditions, the detection limit may be as low as 1 Bq l-1. Tritium activity concentrations below 106 Bq l-1 can be determined without any sample dilution. A prior enrichment step can significantly lower the limit of detection.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes, définitions et symboles
  • 4 Principe
  • 5 Réactifs et équipement
  • 6 Échantillonnage et échantillons
  • 7 Mode opératoire
  • 8 Expression des résultats
  • 9 Rapport d'essai
  • Annexe A Applications numériques
  • Annexe B Distillation d'échantillons de volume important
  • Annexe C Méthode de l'étalon interne
  • Annexe D Distillation d'échantillons de faible volume
  • Annexe E Distillation simplifiée
  • Bibliographie
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