Nuclear energy - Measurement of the radioactivity in the environnment - Water - Measurement of lead 210 activity by liquid scintillation in water

Le présent document décrit les conditions de mesurage de l'activité du plomb-210 en scintillation liquide, après une pré-concentration chimique suivie de la séparation radiochimique du plomb-210 par extraction chromatographique sur résine de type éther-couronne.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2011

Number of pages

18 p.

Reference

NF M60-809

ICS Codes

13.060.60 Examination of physical properties of water

17.240 Radiation measurements

27.120.01 Nuclear energy in general

Classification index

M60-809

Print number

1 - 01/03/2011

Sumary

Nuclear energy - Measurement of the radioactivity in the environnment - Water - Measurement of lead 210 activity by liquid scintillation in water

Le présent document décrit les conditions de mesurage de l'activité du plomb-210 en scintillation liquide, après une pré-concentration chimique suivie de la séparation radiochimique du plomb-210 par extraction chromatographique sur résine de type éther-couronne.

Standard replaced by (1)

NF ISO 13163

January 2014

Standard Cancelled

Water quality - Lead 210 - Test method using liquid scintillation counting

ISO 13163 specifies the determination of lead-210 (210Pb) activity concentration in samples of all types of water using liquid scintillation counting (LSC). For raw and drinking water, the sample should be degassed in order to minimize the ingrowth of 210Pb from radon-222 (222Rn). Using currently available liquid scintillation counters, this test method can measure the 210Pb activity concentrations in the range of less than 20 mBq⋅l-1 to 50 mBq⋅l-1. These values can be achieved with a counting time between 180 min and 720 min for a sample volume from 0,5 l to 1,5 l. Higher 210Pb activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both. It is the laboratory's responsibility to ensure the suitability of this test method for the water samples tested.

Table of contents

Introduction
5
1 Objet et domaine d'application
6
2 Références normatives
6
3 Termes et définitions
7
4 Principe et difficultés de la mesure
9
5 Matériels
9
6 Réactifs
9
6.1 Produits chimiques
9
6.2 Solution radioactive
9
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
10
8.2 Pré-concentration
10
8.3 Séparation du plomb-210 :
11
8.4 Analyse
12
9 Expression des résultats
13
9.1 Détermination des rendements
13
9.2 Calcul de l'activité volumique
14
9.3 Incertitude relative
15
9.4 Seuil de décision
16
9.5 Limite de détection
16
9.6 Limites de confiance
16
9.7 Expression des résultats
17
10 Contrôle de la pureté de la fraction contenant le plomb-210
17
11 Présentation des résultats
17
Bibliographie
18

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