A performance comparison of nine selected liquid scintillation cocktails

Liquid scintillation based quantitative measurement of dual radioisotopes (3H and 45Ca) in biological samples for bone remodeling studies

“…In the selection of an optimal liquid scintillation cocktail, the important aspects generally taken into consideration are overall cocktail performance and specific laboratory needs (Verrezen et al, 2008). Ecolite™ is generally used for a wide variety of biological samples, Ecolume™ is considered good for high ionic salts while Universol™ is good for insoluble and particulate samples.…”

The effect of sample stability on the determination of radioactivity for various radionuclides by liquid scintillation counting

“…For samples with the amount of quenching agent low enough, both Ultima Gold AB and OptiPhase Hisafe 3 exhibit good stability. This is why no variation of the counting efficiency in time could be observed for many cocktails (Verrezen et al, 2008). Since the cocktail without load has no quenching agent added, it is understandable that all the cocktails of Ultima Gold AB with a span of 18 years of storage have shown their very good long-term stability (Feng et al, 2012).…”

“…In such cases, the effect of sample stability on the determination of radionuclide of interest becomes important. The reported researches relevant to sample stability exhibit two problems: (1) Feng et al (2012) have established the usability of expired cocktails, but not the actual constancy of performance characteristics over time, because they have not actually measured long-term changes in the mixture of cocktail and sample; and (2) the quench effect on sample stability had not been mentioned (Verrezen et al, 2008). Quench is the most important issue for LSC (DeVol et al, 2007;Pates et al, 1998;Sosa et al, 2014;Varlam et al, 2015;Zapata-García et al, 2012), which usually leads to reduction in counting efficiency as a result of energy loss in the energy transmission process.…”

“…As reported by Verrezen et al (2008), there are some cases where LSC vials have to be stored for a long period of time after preparation before being counted or recounted. Another common case is concerning the commercial or homemade quenching standard set, which is usually stored for a long period of time.…”

Organically bound tritium level in vegetation at ICIT tritium removal facility

“…Purification of the combustion water was considered a necessity [8,16,17], given that the analysis of tritium from the combustion water without any purification encountered some problems: different impurities and high acidity sample [18,19]. The measured pH values of combustion water were below 1.…”