Tritium in water testing with the Hidex 300 and 600 SL liquid scintillation counters
18 August 2021
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Hidex TDCR technology is ideal for water testing
The Hidex 300 SL and 600 SL liquid scintillation counters have a unique triple photomultiplier tubes (PMT) detector system that helps assess a false-positive from tritium when water testing.
The triple-to-double coincidence ratio (TDCR) generates two sets of data; a blue spectrum based on two PMTs in coincidence (like a traditional LSC), and a red spectrum based on three PMTs in coincidence.
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Tritium will have mirroring blue and red spectra. The spectrum width and height depend on quench and the activity of the sample respectively
Luminescence (false-positive) cannot occur on three PMTs in coincidence, but can occur on two PMTs (like a traditional LSC).
Using TDCR it is possible to assess if tritium is really present in water samples or it is a false positive (high counts but no mirroring spectra).
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