Estimate chronic health effects of heavy metals and radionuclides in food



Credits ( if register as Inter Graduate School Classes Coursd of Hokkaido University ): 2
Instructor name (Affiliation)
豊田 和弘(北海道大学大学院地球環境科学院)
Kazuhiro TOYODA (Faculty of Environmental Earth Science, Hokkaido University)
責任教員連絡先(メール)/Instructor email kazuhiro*ees.hokudai.ac.jp
責任教員連絡先(電話)/Instructor phone 011-706-4512
Link to instructor bio or website https://www.ees.hokudai.ac.jp/ems/stuff/toyoda/SeigLab_en/Toyoda.html
実施期間/Periods 27th-28th June, 1st-3rd July 2024
Language English
実施場所/Class Locations 北海道大学大学院地球環境科学院 その他
Faculty of Environmental Earth Science, Hokkaido University, etc.

Class Information




Participants will learn to assess the health impacts of heavy metals and radionuclides in food. They will choose foods they commonly consume or have an interest in, decompose them with acid, and then determine the levels of elements like lead, cadmium, copper, zinc, and arsenic using an ICP mass spectrometer. From this data, we will calculate the intake amount. Additionally, a gamma-ray spectrometer will be utilized to gauge the radionuclides present in the samples and to estimate the internal radiation exposure. Armed with this knowledge, students will evaluate the health implications of various food sources independently and present their conclusions on the final day of the course.



受講前に以下の文献をあらかじめ参照すること。 PLoS ONE 18(3): e0283420. https://doi.org/10.1371/journal.pone.0283420 PLoS ONE 9(11): e112791. https://doi.org/10.1371/journal.pone.0112791


The following literature should be consulted prior to the course. PLoS ONE 18(3): e0283420. https://doi.org/10.1371/journal.pone.0283420 PLoS ONE 9(11): e112791. https://doi.org/10.1371/journal.pone.0112791

Schedule and Activities








Day 1: Lecture on selection of analytical samples and impact assessment

Day 2: Start of disassembly of analytical samples and measurement of radionuclides

Day 3: Heavy metal analysis of analyzed samples (at the open facility of Hokkaido University)

Day 4: Analysis of radionuclide measurement results

Day 5: Individual presentations on health effects and discussion among participants


  • 研究院のICP装置で飲用水の元素分析中 / Elemental analysis of drinking water in progress using ICP equipment at the faculty.

  • ガンマ線測定装置で測定した試料中の放射性核 種のBq値を白板に各自書き出す / Write down the Bq value of radionuclides in the sample measured by the gamma-ray measuring device on a white board by each person.


履修登録はこちらから。/ Click here to register.

履修登録終了:2024年4月24日 / Registration CLOED:24th April 2024

Class Information




To be able to estimate the risk of heavy metal elements and radionuclides by oneself in the food health impact assessment. You will be able to assess the degree of risk of any issue-related accident by yourself.


For the measurement of an analysis sample, you will need about 1g for elemental analysis and 30g for radionuclides. You will also be given an ultra-cleaned container for drinking water on the first day, so it is advisable to prepare your samples in advance. In addition, the gamma-ray measuring device used in this lecture is not shielded, so it can only perform up to half quantification of radionuclides.