Determination of radon in water using liquid scintillation counting

A rapid, accurate and highly sensitive method for the determination of radon in water with a liquid scintillation counter is described. The method is based on the high solubility of radon in toluene (toluene scintillator solution). An overall recovery of 90.5% (including the extraction and detection processes) was achieved; the limits of detection and determination were 0.054 and 0.12 Bq/l, respectively. The total error of determination did not exceed 10% for radioactivities not lower than 1 Bq/l. (Z.S.) 1 tab., 3 figs., 6 refs