Kawamura H, Hirano S, Nishimuta M
National Institute of Radiological Sciences, Anagawa, Chiba, 263-8555, Japan.
Radiat Prot Dosimetry. 2003;105(1-4):61-4. doi: 10.1093/oxfordjournals.rpd.a006312.
Ingestion and excretion of environmental 99Tc was measured in an adult male who ingested 'hijiki' food in his diet that contained a sub-bequerel activity per kg, and which was prepared from a marine alga, Hizikia fusiforme, or hijiki in Japanese, traditionally eaten in the Japanese diet. Harvested hijiki was boiled, dried and cooked. This was eaten at each meal five times over 2 d. All faeces and 24-h urine samples were collected during the 3 d before and subsequent 11 d starting from the day when the intake began. The ingestion intake was measured by analysing the dried hijiki material. 99Tc was determined by using liquid-liquid extraction and low-background beta ray spectrometry. The excreta were also analysed for minerals by atomic absorption spectrometry. The apparent absorption rate in the gastrointestinal tract for 99Tc under these conditions was calculated to be approximately 0.5. The present result from a single subject indicates the need for further studies.
对一名成年男性摄入和排泄环境中的99锝的情况进行了测量。该男性在饮食中食用了每千克含有低于1贝克勒尔活度的“裙带菜”，这种裙带菜由一种海藻——日本的羊栖菜（Hizikia fusiforme）制成，是日本传统饮食中的常见食材。收获的裙带菜经过水煮、干燥和烹饪后食用。在2天内，每餐都食用这种裙带菜，共食用了5次。从摄入开始之日起，在之前3天和随后11天内收集所有粪便和24小时尿液样本。通过分析干燥后的裙带菜材料来测量摄入量。使用液 - 液萃取和低本底β射线光谱法测定99锝。还通过原子吸收光谱法对排泄物中的矿物质进行分析。在这些条件下，胃肠道对99锝的表观吸收率经计算约为0.5。来自单一受试者的当前结果表明有必要进行进一步研究。
