NF M60-802-2

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.

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National standards and national normative documents

Publication date

July 2000

Number of pages

15 p.

Reference

NF M60-802-2

ICS Codes

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

Classification index

M60-802-2

Print number

1 - 19/06/2000
Sumary
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 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.

Table of contents
  • Introduction
    5
  • 1 Objet et domaine d'application
    5
  • 1.1 Objet
    5
  • 1.2 Domaine d'application
    5
  • 2 Références normatives
    5
  • 3 Définitions, symboles, abréviations (1, 2, 3)
    6
  • 4 Principe
    8
  • 5 Réactifs
    8
  • 5.1 Liquide scintillant
    8
  • 5.2 Source radioactive certifiée de carbone-14 ou une dilution de cette source
    9
  • 5.3 Agent d'affaiblissement lumineux (agent quenchant)
    9
  • 5.4 Eau de référence
    9
  • 6 Équipements
    9
  • 6.1 Matériels de laboratoire
    9
  • 6.2 Ensemble de mesure à scintillation liquide
    10
  • 7 Échantillonnage
    10
  • 7.1 Prélèvement de l'échantillon
    10
  • 7.2 Conservation de l'échantillon pour analyse
    10
  • 8 Mode opératoire
    10
  • 8.1 Préparation de l'échantillon
    11
  • 8.2 Préparation des sources à mesurer
    11
  • 8.3 Analyse
    11
  • 9 Expression des résultats
    12
  • 9.1 Activité volumique du radionucléide présent dans l'échantillon
    12
  • 9.2 Seuil de décision
    13
  • 9.3 Limite de détection
    13
  • 10 Présentation des résultats
    13
  • 10.1 Activité volumique du carbone 14 présent dans l'échantillon et son incertitude associée ou limite de détection
    14
  • Bibliographie
    15
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