title: Assay of 222Rn in water samples by a modified integral counting method.
abstract: 22Rn activity concentrations in water collected from 163 private wells and 14 springs in Tokyo were measured with a liquid scintillation spectrometer using a modified integral counting method. The activity concentrations of 222Rn range from 0.2 to 22.9 Bq/L and average 4.8 Bq/L. The errors due to the air luminescence counts and the interferences from 220Rn and 219Rn are discussed and evaluated. 222Rn samples of 0.2 Bq/L can be assayed within an overall uncertainty of 3.1%. The liquid scintillation method involving agitation of the sample water directly with a liquid scintillation cocktail was compared with the present method and evaluated.
authors.affiliation: Laboratory for Radiopharmaceutical Chemistry, Kyoritsu College of Pharmacy, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Murase
authors.forename: Y
authors.initials: Y
authors.lastname: Homma
authors.forename: I
authors.initials: I
authors.lastname: Murakami
authors.forename: K
authors.initials: K
authors.lastname: Handa
mesh_terms: D005618:Fresh Water / Q000032:analysis*; D008163:Luminescent Measurements; D011886:Radon / Q000032:analysis*; D012588:Scintillation Counting / Q000379:methods; D014041:Tokyo; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D011886:Radon