The simplified method of measuring radon in mineral waters by the liquid scintillation counter

Radon in mineral waters was determined with simplicity by newly developed method. In this method, 2.0 ml of water sample was directly mixed with 15 ml of Hionic-Fluor in a vial, which was then filled up with additional Hionic-Fluor; 190 minutes were allowed for the radioactivity to equilibrate. The radioactivity of Radon was measured by the liquid Scintillation Counter (Tri-Carb 460C). Radon content was easily calculated with the proposed formula by an electric desk calculator. The reproducibility was proved CV = 5.77 %; the lowest detection limit was 0.2 nCi-1. An adequate correlation was obtained from the results of measurements compared with the original method; r = 0.996, y = 0.818x x 0.875. (author)