Norm

NEN-EN-ISO 9698:2015 en

Water - Bepaling van de werking van de tritiumconcentratie - Vloeibare scintillatie telmethode

106,87

Over deze norm

Status Definitief
Aantal pagina's 24
Commissie Radioactiviteit - Toepassing en meten
Gepubliceerd op 01-08-2015
Taal Engels
NEN-EN-ISO 9698 specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water ([3H]H2O) 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 (see References. 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 (see References. Three distillation procedures are described in Annexes B, D and E. 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 (see References.

Details

ICS-code 13.060.60
13.080
Nederlandse titel Water - Bepaling van de werking van de tritiumconcentratie - Vloeibare scintillatie telmethode
Engelse titel Water quality - Determination of tritium activity concentration - Liquid scintillation counting method
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