NF ISO 13168, M60-828 (12/2023)

This document describes a test method applicable to the simultaneous measurement of 3H and 14C in water samples by counting scintillations in a liquid medium from a source obtained by mixing the water sample with a hydrophilic scintillation cocktail. The method described in this document is called "screening", due to the potential presence of interfering radionuclides in the test sample. If it is assumed that the sample does not contain these interferents, 3H and 14C can be measured quantitatively. This method can be used for any type of environmental study or environmental monitoring. It is also applicable to the measurements of samples for testing distribution and/or drinking water, rainwater, surface and groundwater, seawater, as well as cooling water, industrial water, domestic and industrial wastewater whose volume activity is between 5 Bq·l-1 and 106 Bq·l-1 (upper limit of scintillation counters in a liquid medium for direct counting). For higher activity concentrations, the test sample can be diluted to obtain a test portion within this range.
(Automatic translation from French)