NF ISO 9698

NF ISO 9698

February 2011
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.

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Main informations

Collections

National standards and national normative documents

Thematics

Sécurité, Gestion des risques et SST, QSE

Publication date

February 2011

Number of pages

32 p.

Reference

NF ISO 9698

ICS Codes

13.060.60   Examination of physical properties of water
13.280   Radiation protection

Classification index

M60-817

Print number

1 - 11/02/2011

International kinship

ISO 9698:2010
Sumary
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.

Replaced standards (1)
NF M60-802-1
July 2000
Standard Cancelled
Nuclear energy - Measurement of radioactivity in the environment-Water - Part 1 : Beta emitters activity measurement by liquid scintillation - Particular case of tritium

Le présent document décrit les conditions de mesurage de l'activité des émetteurs Bêta purs par scintillation liquide adaptées au mesurage du tritium dans les échantillons d'eau.

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

<p>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.</p> <p>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.</p> <p>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.</p> <p>The method is not applicable to the analysis of organically bound tritium; its determination requires additional chemical processing (such as chemical oxidation or combustion).</p> <p>With suitable technical conditions, the detection limit may be as low as 1 Bq l<sup>-</sup><sup>1</sup>. Tritium activity concentrations below 10<sup>6</sup> Bq l<sup>-</sup><sup>1 </sup>can be determined without any sample dilution. A prior enrichment step can significantly lower the limit of detection.</p>

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Symboles, définitions et unités
    2
  • 4 Principe
    3
  • 5 Réactifs et équipement
    4
  • 6 Échantillonnage et échantillons
    6
  • 7 Mode opératoire
    6
  • 8 Expression des résultats
    9
  • 9 Rapport d'essai
    11
  • Annexe A (informative) Applications numériques
    12
  • Annexe B (informative) Distillation d'échantillons de volume important
    14
  • Annexe C (informative) Méthode avec solution d'étalon interne
    17
  • Annexe D (informative) Distillation d'échantillons de faible volume
    19
  • Annexe E (informative) Méthode d'évaluation pour matrices humides
    22
  • Bibliographie
    24
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