Contributions of 18 food categories to intakes of 232Th and 238U in Japan.
Contributions of 18 food categories to intakes of 232Th and 238U in Japan.
复制标题
日本 18 类食物对 232Th 和 238U 摄入量的贡献。
DOI：
10.1097/00004032-200001000-00006
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发表时间：
2000
期刊：
影响因子：
2.2
通讯作者：
M. Yamamoto
中科院分区：
文献类型：
--
作者：
K. Shiraishi;K. Tagami;Y. Muramastu;M. Yamamoto
日本人每天232Th和238U的摄入量以及食物类别对核素摄入量的贡献是通过对18种食物类别的市场篮子研究来估计的。238U含量较高的食物类别如下：海藻1140微Bq；鱼和贝类37微Bq；坚果和种子11微Bq；豆制品8.6微Bq；熟食7.3微Bq。对日本每日238U的摄入量贡献最大的是：海藻(50%)；鱼类和贝类(26%)；以及豆制品(4.3%)。~(232)Th的含量较高(每克鲜重)为：海藻28微Bq；鱼类和贝类13微Bq；坚果和种子8.2微Bq；绿色蔬菜3.9微Bq；熟食3.5微Bq；豆制品2.9微Bq。每日232Th摄入量的主要贡献者为：鱼类和贝类(44%)；绿色蔬菜(11%)；豆制品(7.4%)；海藻(6.0%)。对于这两种核素，海洋食品是主要贡献者，而油脂、鸡蛋和熟食则是次要贡献者。日本人均每日232Th和238U的摄入量分别为2.7MBq和14MBq。年有效剂量估算为232Th、2.2×10(-7)Sv和238U、2.2×10(-7)Sv。
Daily intakes of 232Th and 238U and contributions of food categories to those nuclide intakes in Japanese were estimated using a market basket study for 18 food categories. Food categories having higher 238U contents (per g-fresh) were found to be as follows: seaweeds 1,140 microBq; fishes and shellfishes 37 microBq; nuts and seeds 11 microBq; bean products 8.6 microBq; and cooked meals 7.3 microBq. Big contributors to the daily 238U intake in Japan were as follows: seaweeds (50%); fishes and shellfishes (26%); and bean products (4.3%). For 232Th, higher contents (per g-fresh) were found as follows: seaweeds 28 microBq; fishes and shellfishes 13 microBq; nuts and seeds 8.2 microBq; green vegetables 3.9 microBq; cooked meals 3.5 microBq; and bean products 2.9 microBq. Big contributors to the daily 232Th intake were as follows: fishes and shellfishes (44%); green vegetables (11%); bean products (7.4%); and seaweeds (6.0%). For both nuclides, marine food products were big contributors, while minor contributors were oil and fats, eggs, and cooked meals. Daily intakes of 232Th and 238U in Japan were estimated to be 2.7 mBq and 14 mBq per person from the intakes of the 18 categories, respectively. Annual effective doses were estimated to be 232Th, 2.2 x 10(-7) Sv, and 238U, 2.2 x 10(-7) Sv.