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EVS-EN ISO 13162:2015

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

General information
Withdrawn from 01.07.2021
Base Documents
ISO 13162:2011; EN ISO 13162:2015
Directives or regulations
None
Standard history
Status
Date
Type
Name
01.07.2021
Main
02.09.2015
Main
This International Standard 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 10(up)6 Bq/l without any sample dilution.
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