From 8 different gelating cocktails measured in the Triathler device, we have found the best results for AquaLight™, Ultima Gold™ AB and OptiPhase HiSafe™ 3 in a ratio of 8 mL water to 12 mL cocktail (s. a. [Salonen 1993]).
The quality of α/β-PSD in aqueous phases is influenced by quenching from higher salt content or in EDTA-containing solutions (2.2.1.5.). A maximum of 6 mL could be mixed with 16 mL OptiPhase HiSafe 3 in order to form a clear gel. Milky opaque emulsions do not allow any α/β-separation capability.
L’Annunziata M.F. 2012: “Handbook of Radioactivity Analysis”, Chapter 15, 3rd Edition 2012, Elsevier
Salonen L. 1993: Measurement of low levels of 222Rn in water with different commercial liquid scintillation counters and pulse-shape analysis; in: J.E. Noakes et al. “Liquid Scintillation Spectrometry 1992”, pp 361-372, Radiocarbon 1993, Tucson