3×3” Nal(TI), Marinelli and cylindrical samples

A suitable procedure for dual label counting is normally supplied with the delivery of the liquid scintillation counting equipment.

(iii) Analysis of 60Co labelled water tracer by gamma spectrometry

The 60Co labelled water tracer is [60Co(CN)6]3-. The 60Co emits strong gamma radiation resulting in a simple gamma spectrum (main energies at 1173 and 1332 keV).

Thus, gamma spectrometry may be a useful analytical method, also when this radionuclide is in mixtures with tritium, 14C or 35S labelled compounds, since these are pure beta emitters. Analysis of this compound in water samples may be done in different ways: