Internal exposure to ^<210>Po and ^<40>K from ingestion of cooked daily foodstuffs for adults in Japanese cities
スポンサーリンク
概要
- 論文の詳細を見る
The isotope ^<210>Po was suspected of being involved in the death of a former Russian intelligence agent in 2006 in the UK. Although human exposure to this natural radionuclide in foods is estimated to be high, few studies are available. UNSCEAR Report 2000 does not contain data on ^<210>Po concentrations of foodstuffs in Japan. We analyzed samples of the everyday Japanese diet cooked with foodstuffs purchased at supermarkets in 7 major domestic cities in 2007-2008. ^<210>Po was quantified by alpha spectrometry and natural radionuclides such as ^<40>K by gamma spectrometry. The daily intake and committed effective dose of ^<210>Po, ^<40>K, and other natural radionuclides for Japanese adults were calculated. Daily intake was 0.34-1.84 (mean±σ:0.66±0.53) and 68.5-94.2 (81.5±8.5) Bq/d and the committed effective dose was 0.15-0.81 (0.29±0.24) and 0.16-0.21 (0.18±0.02) mSv for ^<210>Po and ^<40>K, respectively, comprising a high percentage of the total exposure. The total of the mean committed effective dose for the two nuclides (0.47 mSv) was higher than the annual effective dose from ingestion of foods reported by UNSCEAR 2000 (0.29 mSv). The mean committed effective dose of ^<40>K in the 7 major Japanese cities was comparable to the global average (0.17 mSv). The dietary exposure of Japanese adults can be characterized by a higher ^<210>Po contribution than in other countries. Of the total daily dietary ^<210>Po exposure (13 food categories excluding water) for adults in Yokohama, about 70% was from fish/shellfish and 20% from vegetables/mushrooms/seaweeds, reflecting preferences of Japanese to eat a considerable amount of fish/shellfish containing high ^<210>Po concentrations.
- 日本トキシコロジー学会の論文
- 2009-08-01
著者
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TERADA Hiroshi
Department of Applied Biological Sciences, Faculty of Agricultural Science, Nagoya University
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Takami H
Subaru Telescope Naoj
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杉山 英男
国立公衆衛生院
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KOBAYASHI Jun
Department of Psychiatry, University of Tsukuba Hospital
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Terada H
National Institute Of Public Health
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杉山 英男
Dep. Of Environmental Health National Inst. Of Public Health
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Sugiyama Hideo
Department Of Environmental Health National Institute Of Public Health
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Terada Hiroshi
Department Of Environmental Health National Institute Of Public Health
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Isomura Kimio
Atmospheric Environmental Division, Hyogo Prefectural Institute of Public Health and Environmental S
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Iijima Ikuyo
Chemistry Division, Kanagawa Prefectural Institute of Public Health
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Kitamura Kiyoshi
Division of Analytical Affairs, Japan Chemical Analysis Center
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Sugiyama Hidetoshi
Kanagawa Environmental Research Center
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杉山 英男
公衆衛生院
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Iijima Ikuyo
Chemical Div. Kanagawa Prefectural Inst. Of Public Health
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Isomura Kimio
Atmospheric Environmental Division Hyogo Prefectural Institute Of Public Health And Environmental Sc
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Sugiyama Hideo
Dep. Of Environmental Health National Inst. Of Public Health
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Kobayashi Jun
Department Of Health Science Faculty Of Medicine Kanazawa University:department Of Environmental Hea
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Kitamura Kiyoshi
Division Of Analytical Affairs Japan Chemical Analysis Center
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Terada Hiroshi
Department Of Applied Biological Sciences Faculty Of Agricultural Science Nagoya University
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KOBAYASHI Jun
Department of Applied Science, School of Veterinary Nursing and Technology, Nippon Veterinary and Life Science University, 1–7–1 Kyounan, Musashino, Tokyo 180–8602, Japan
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