Recent progress and application of low level liquid scintillation counting

A Beta Test Comparison Between the New Packard 2260 XL and the LKB Quantulus and 1219 SM: Low-Level Radiocarbon and Tritium Determinations

“…It should be noted that the background is elevated when measuring for natural tritium using glass vials in the Quantulus LS counter as compared to the same cocktails used in the special LKB teflon vials or with polyethylene vials (Kaihola, pers commun, June 1988). Schonhofer and Henrich (1987) report figure of merit values as high as 1849 for tritium samples counted in the Quantulus using teflon vials. These special teflon vials must be meticulously cleaned to ensure sample integrity.…”

“…Table 2 lists the background count rate, efficiency of counting and figure of merit for each counter for tritium. These data were collected by counting samples of deionized water from the Tucson Aquifer Schonhofer and Henrich (1987) report figure of merit values as high as 1849 for tritium samples counted in the Quantulus using teflon vials. These special teflon vials must be meticulously cleaned to ensure sample integrity.…”

Modelling the spatio-temporal evolution of 3H in the waters of the River Tagus

“…The distilled sample was then mixed with a scintillation solution of Optiphase Hisafe 3 from LKB-Wallac at a sample/scintillator ratio of 8/12 (Schönhoffer and Henrich, 1987) in 20 mL teflon-coated polyethylene vials. Tritium content was determined using a Quantulus-1220, LKB-Wallac, liquid-scintillation alphaebeta spectrometer.…”

An easy method for Ra-226 determination in river waters by liquid-scintillation counting

“…In recent years the application of liquid scintillation counting techniques for the determination of this radionuclide in waters is increasing [1,2,3]. This is due to the advantages provided by the new liquid scintillation counters: no self-absorption effects, high efficiencies, discrimination between alpha and beta emissions and low background.…”