NF ISO 13162

NF ISO 13162

May 2012
Standard Cancelled

Water quality - Determination of carbon 14 activity - Liquid scintillation counting method

ISO 13162:2011 specifies the conditions for the determination of 14C activity concentration in samples of environmental water or of 14C-containing water using liquid scintillation counting.The method is applicable to the analysis of any organic molecule soluble in water that is well mixed with the scintillation cocktail. It does not apply to micelles or "large" particles (lipids, fulvic acid, humic acid, etc.) that are inadequately mixed with the scintillation cocktail and the water. Some beta energy is lost without any excitation of the scintillation cocktail and the results are underestimated. The method is not applicable to the analysis of organically bound 14C, whose determination requires additional chemical processing (such as chemical oxidation, combustion).It is possible to determine 14C activity concentrations below 106 Bq l-1 without any sample dilution.

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National standards and national normative documents

Publication date

May 2012

Number of pages

29 p.

Reference

NF ISO 13162

ICS Codes

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

Classification index

M60-826

Print number

1 - 27/04/2012

International kinship

ISO 13162:2011
Sumary
Water quality - Determination of carbon 14 activity - Liquid scintillation counting method

ISO 13162:2011 specifies the conditions for the determination of 14C activity concentration in samples of environmental water or of 14C-containing water using liquid scintillation counting.

The method is applicable to the analysis of any organic molecule soluble in water that is well mixed with the scintillation cocktail. It does not apply to micelles or "large" particles (lipids, fulvic acid, humic acid, etc.) that are inadequately mixed with the scintillation cocktail and the water. Some beta energy is lost without any excitation of the scintillation cocktail and the results are underestimated. The method is not applicable to the analysis of organically bound 14C, whose determination requires additional chemical processing (such as chemical oxidation, combustion).

It is possible to determine 14C activity concentrations below 106 Bq l-1 without any sample dilution.

Replaced standards (1)
NF M60-802-2
July 2000
Standard Cancelled
Nuclear energy - Measurement of radioactivity in the environment-Water - Part 2 : Beta emiters activity measurement by liquid scintillation - Particular case of carbon-14

Le présent document décrit les conditions de mesurage de l'activité des émetteurs purs par scintillation liquide adaptés au mesurage du carbone-14.

Standard replaced by (1)
NF EN ISO 13162
October 2015
Standard Cancelled
Water quality - Determination of carbon 14 activity - Liquid scintillation counting method

ISO 13162:2011 specifies the conditions for the determination of 14C activity concentration in samples of environmental water or of 14C-containing water using liquid scintillation counting. The method is applicable to the analysis of any organic molecule soluble in water that is well mixed with the scintillation cocktail. It does not apply to micelles or "large" particles (lipids, fulvic acid, humic acid, etc.) that are inadequately mixed with the scintillation cocktail and the water. Some beta energy is lost without any excitation of the scintillation cocktail and the results are underestimated. The method is not applicable to the analysis of organically bound 14C, whose determination requires additional chemical processing (such as chemical oxidation, combustion). It is possible to determine 14C activity concentrations below 106 Bq l-1 without any sample dilution.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Symboles, définitions, unités et abréviations
    2
  • 4 Principe
    2
  • 5 Réactifs et équipement
    3
  • 5.1 Réactifs
    3
  • 5.2 Équipement
    4
  • 6 Échantillonnage et échantillons
    5
  • 6.1 Échantillonnage
    5
  • 6.2 Conservation des échantillons
    5
  • 7 Mode opératoire
    6
  • 7.1 Préparation des échantillons
    6
  • 7.2 Préparation des sources à mesurer
    6
  • 7.3 Mode opératoire de comptage
    6
  • 7.4 Étalonnage et vérification
    6
  • 7.5 Conditions de mesurage
    7
  • 8 Expression des résultats
    7
  • 8.1 Généralités
    7
  • 8.2 Calcul de l'activité volumique
    7
  • 8.3 Seuil de décision
    9
  • 8.4 Limite de détection
    9
  • 8.5 Limites de l'intervalle de confiance
    9
  • 8.6 Calculs utilisant l'activité par unité de masse
    10
  • 9 Rapport d'essai
    10
  • Annexe A (informative) Applications numériques
    11
  • Annexe B (informative) Méthode de l'étalon interne
    13
  • Annexe C (informative) Extraction du carbone total: comptage des précipités
    15
  • Annexe D (informative) Extraction du carbone total: comptage par absorption
    18
  • Bibliographie
    21
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