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  • 1 National Institute for Fusion Science Safety and Environmental Research Center Oroshi-cho 322-6 Toki 509-5292 Japan
  • | 2 Nagoya University School of Health Sciences Daiko-cho, Higashi-ku, Nagoya 461-8673 Japan
  • | 3 Japan Air-conditioning Service Co. & Ltd Terugaoka 239-2 Meito-ku, Nagoya 465-0042 Japan
  • | 4 Nagoya University Graduate School of Engineering Furou-cho, Chikusa-ku, Nagoya 464-8603 Japan
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Liquid scintillation counting is the most popular method for tritium measurement, however, it takes much time and a lot of doing to distill off the impurities before mixing the sample water and liquid scintillation cocktail. We have investigated the possibility of an alternative method to the distillation. We have found out that the filtration can be an alternative to distillation for the environmental water samples before electrolytic enrichment.