An improved method for low-level222Rn determination in environmental waters by liquid scintillation counting with pulse shape analysis |
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| Authors: | H Bem Y Y Y Bakir F Bou-Rabee |
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| Institution: | (1) Radiation Protection Division, Ministry of Public Health, P.O. Box 16087, 35851 Qadeseyah, Kuwait;(2) Faculty of Science, Department of Geology, Kuwait University, P.O. Box 5969, Kuwait;(3) Present address: Institute of Applied Radiation Chemistry, Technical University,  ód , Poland |
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| Abstract: | A method in which222Rn is extracted from 0.5 1 water samples to 20 ml toluene is described. 10 ml toluene solution with extracted222Rn is directly added to a glass scintillation vial containing 10 ml of liquid naphthalene based scintillation cocktail. Apart from diluting by toluene, the final counting solution still has excellent properties in terms of:  / separation by pulse shape analysis, detection efficiency and background in the -region. The detection limit of222Rn for 0.5 1 water samples was 1.5 mBq l–1 (for 12,000 s count time). The concentration of222Rn in different environmental samples such as rain, tap and mineral waters as well as deep well waters were determined. |
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