Aiko Yutani

Osaka Prefectural Institute of Public Health

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Masanao Shinya

Osaka Prefectural Institute of Public Health

Asako Ozaki

Osaka Prefectural Institute of Public Health

Tetsuo Yamano

Osaka Prefectural Institute of Public Health

Eri Kishi

Osaka Prefectural Institute of Public Health

Kenshi Katahira

Institute of Public Health

Tomoko Ooshima

Osaka Prefectural Institute of Public Health

Kunihiro Funasaka

Osaka Prefectural Institute of Public Health

Yukihiko Yamaguchi

Osaka Prefectural Institute of Public Health

Hiroshi Moriwaki

Shinshu University

Tadashi Nakatani

Osaka Prefectural Institute of Public Health

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Osaka Prefectural Institute of Public Health

Institute of Public Health

Osaka City University

Shinshu University

Okayama University

Osaka Prefecture University

Juntendo University

Juntendo University Hospital

Mie University

University of British Columbia

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Survey of Total Mercury Content in Fishery Products

Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) (2022)

Aiko Yutani Tadashi Nakatani Asako Ozaki Yukihiko Yamaguchi Tetsuo Yamano

2013年から2018年に大阪市内で購入した魚介加工品112検体について,加熱気化水銀計を用いて総水銀を測定した.その結果,マグロ加工品の総水銀濃度は平均0.115 µg/g(中央値0.070 µg/g)であった.中でもビンナガマグロを原材料とした加工品の総水銀濃度は高く,平均0.301 µg/g(中央値0.296 µg/g)であった.今回調査した魚介加工品の総水銀濃度はマグロ類を原材料とした加工品および混合削り節(サバ,イワシおよびアジの削り節)を除いて概ね低く,0.1 µg/g未満であった.今回の調査結果と日本人の平均的な食生活での魚介加工品摂取量から推定した体重50 kgの人の総水銀摂取量は0.13 µg/kg体重/週であり, FAO/WHO合同食品添加物専門家会議が評価した総水銀の暫定的耐容週間摂取量4.0 µg/kg体重/週の3.3%に相当する量であった.以上より魚介加工品の摂取は通常の摂食では問題ないが,妊婦が総水銀濃度の比較的高いビンナガマグロを原材料としたツナ缶を日常的に摂食した場合には食品安全委員会が評価した妊婦に対するメチル水銀の耐容週間摂取量(2 µg/kg体重/週)を超過する可能性が示唆された.

Mercury

10.3358/shokueishi.63.85

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Determination of Uranium in Spinach

Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) (2013)

Eri Kishi Aiko Yutani Asako Ozaki Masanao Shinya Kenshi Katahira

After the severe accident at the Fukushima-1 Nuclear Power Plant in March 2011, radioactive contamination of food has become a matter of serious concern in Japan. There is considerable information about radioactive iodine and cesium, but little is known about uranium contamination. We determined uranium content in spinach by the Japanese official method (Manual on Radiation Measurement of Food in Emergency Situations). In the preliminary study, we confirmed that the use of a microwave digestion system for preparing the test solution of spinach could shorten the testing time and give acceptable results. The manual recommends the use of two elements (Tl and Bi) as internal standards for measurement of uranium by ICP-MS. We found that Tl was more suitable than Bi to quantify trace amounts of uranium in spinach. However, it was necessary to determine Tl or Bi concentrations in the sample before analysis, since some samples of spinach contained significant amounts of these elements. The uranium contents of 9 spinach samples bought in April and May 2011 were less than 10 μg/kg, which are very low compared to the provisional regulatory limit in Japan.

10.3358/shokueishi.54.111

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Development and Validation of Simultaneous Analysis of Minerals and Toxic Elements in Foods by ICP-MS

Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) (2016)

Aiko Yutani Eri Kishi Asako Ozaki Masanao Shinya Tomoko Ooshima

ICP-MSを用いた食品中のミネラルおよび有害元素の一斉分析法を検討した．試料溶液の調製にはマイクロウェーブを用いた．測定条件，内標準元素を測定対象元素ごとに検討したのち，「食品中の金属に関する試験法の妥当性評価ガイドライン」に従い妥当性評価を行った．その結果，使用した3種の標準試料，「日本の食事」（国立環境研究所CRM No. 27），「玄米粉末」（国立環境研究所CRM No. 10-b）および「粉ミルク」（NIST SRM 1849 Infant/Adult Nutritional Formula）に含まれる18元素（Na, Mg, P, Ca, K, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Cd, SnおよびPb）について，玄米粉末中のNaを除くすべての元素で真度，併行精度および室内再現精度の性能パラメータが目標値を満たしていた．

10.3358/shokueishi.57.57

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Citations (2)

Heavy Metals Involved in Human Health and Environment

Seikatsu eisei (2006)

Masanao Shinya Kunihiro Funasaka Kenshi Katahira Aiko Yutani Hiroshi Moriwaki

10.11468/seikatsueisei.50.261

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