Journal of Radioanalytical and Nuclear Chemistry

, Volume 307, Issue 3, pp 2117–2122

High-sensitivity determination of radioactive cesium in Japanese foodstuffs: 3 years after the Fukushima accident

  • Katsumi Shozugawa
  • Takuya Saito
  • Mayumi Hori
  • Motoyuki Matsuo
Article

DOI: 10.1007/s10967-015-4407-8

Cite this article as:
Shozugawa, K., Saito, T., Hori, M. et al. J Radioanal Nucl Chem (2016) 307: 2117. doi:10.1007/s10967-015-4407-8

Abstract

We analyzed 134Cs, 137Cs and 40K in 96 foodstuffs in supermarkets with high sensitivity over 3 years after Fukushima accident. Milk, yoghurt, rice, tea, salmon, cereal, blueberry, miso, and apples had a trace of 134Cs and 137Cs from 10−3 to 100 Bq/kg, however, some mushrooms that were bought in the outer Fukushima prefecture were contaminated by radioactive cesium over the regulatory limit (100 Bq/kg). In view of the 134Cs/137Cs radioactivity ratio, we can conclude that 137Cs detected in remote areas 300 km or more from Fukushima Nuclear power plant contained activity from Pre-Fukushima events such as Chernobyl accident (1986) and atmospheric nuclear explosions (from 1945).

Keywords

Fukushima accident Radiocesium (137Cs, 134Cs) Foodstuffs in Japan Concentration treatment 

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Katsumi Shozugawa
    • 1
  • Takuya Saito
    • 2
  • Mayumi Hori
    • 1
  • Motoyuki Matsuo
    • 1
  1. 1.Graduate School of Arts and SciencesThe University of TokyoMeguro-kuJapan
  2. 2.Akita Radiation Measuring Station (Beguredenega)KatagamiJapan

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