【摘要】 于１９９２年和１９９３年的不同季节，在上海市各行政区采集了食品样９类共１９种，自来水样２０个，以调查上海市居民食品和饮水中氚含量，并对居民的氛摄入量进行估算。调查结果表明，食品游离水氛含量均值为４．１１Ｂｑ·Ｌ－１，食品有机结合氚含量均值为２８．４４Ｂｑ·Ｌ－１，较游离水氚约高６倍。饮水中氚浓度为１．３２Ｂｑ·Ｌ－１。上述数据表明，上海市食品及饮水中氚含量为本底水平。上海市居民的氛摄入量为４．７ｋＢｑ·ａ－１，其中通过食品摄入的氚为４．０ｋＢｑ·ａ－１，饮水摄入氚为０．７ｋＢｑ·ａ－１，分别占８５％和１５％。更多还原

【Abstract】 The samples of 9 kinds of foods and 20 samples of tap water were collected from Shanghai district during 1992-1993, and their 3H contents were measured. The results showed in foods the 3H contents in free water and in organically combined state were 4. 11and 28. 44 Bq/L respectively,and that in drinking water was 1. 32 Bq/L. These values were within normal natural background. The annual ingestion of 3H was estimated to be 4. 7 kBq,in which 4. 0 kBq came from foods, i. e., the contribution of foods amounted to 85 %. Theconclusion was drawn foods was the main source of 3H ingestion of residents of ShanghaiCity.更多还原