著者
長沢 佳熊 樫田 義彦 城戸 靖雅
出版者
The Japan Society for Analytical Chemistry
雑誌
分析化学 (ISSN:05251931)
巻号頁・発行日
vol.9, no.4, pp.310-316, 1960

昭和33年10月,太平洋海域で漁獲した汚染度のいちじるしいマグロ類肝臓を入手したので,これらのうちの4検体についてTomskinsのイオン交換樹脂法および沈殿法によつて放射性核種を分離し,半減期,吸収およびエネルギーの測定によって<SUP>59</SUP>Fe,<SUP>65</SUP>Zn,<SUP>115m</SUP>Cdおよび<SUP>90</SUP>Sr+<SUP>90</SUP>Yを確認し,さらにそれぞれを定量した.<BR><SUP>65</SUP>Znならびに<SUP>59</SUP>Feは,<SUP>55</SUP>Feとともにビキニ海域で漁獲された魚類からすでに検出されている.また<SUP>113</SUP>Cd,<SUP>113m</SUP>Cdおよび<SUP>115m</SUP>Cd<SUP>9</SUP>がマグロ類から定性的に検出されているが,今回は<SUP>115m</SUP>Cdのみを確認し,定量をおこなった.<BR><SUP>65</SUP>Znおよび<SUP>59</SUP>Feは明らかに誘導放射性核種であり,また<SUP>115m</SUP>Cdはfission product中の生成率はきわめて少ないと考えられるにもかかわらず,これらが汚染の主要原因となっていることは興味深い.<BR>今回分析に供した以外の生肝臓数検体についてγ線スペクトルを測定した結果,<SUP>65</SUP>Znおよび<SUP>59</SUP>Feはいずれの検体についても共通に認められたが,さらに未確認ではあるが<SUP>54</SUP>Mnと思われるピークを認めた.
著者
武田 洋 樫田 義彦
出版者
Journal of Radiation Research Editorial Committee
雑誌
Journal of Radiation Research (ISSN:04493060)
巻号頁・発行日
vol.20, no.2, pp.174-185, 1979-05-15 (Released:2006-07-14)
参考文献数
18
被引用文献数
17

Distribution and retention of tritium in various tissue of a rat after administration of tritiated water (HTO) was investigated during about 100 days. Tritium incorporated into the body was rapidly and uniformly distribution in the whole body and excreted immediately with a biological half-life of 3.5 days for almost all the tissues. However, excretion of tritium incorporated into the tissue constituents was relatively slow and the retention curves were considerably different from tissue to tissue. At the end of this experiment, the highest concentration of total tritium was observed in the fat tissue, followed by brain and muscle. These results suggested that the intake of tritium from HTO into organic compounds and the excretion of tissue-bound tritium would be related to metabolic activity of the tissue. This prediction was reinforced by the experiment on age dependence. The radiation dose to each tissue after the administration of 6.0 μCi/g body weight of HTO ranged from 2.0 to 9.5 rem, which was the highest in blood and the lowest in fat tissue. Contribution from tissue-bound tritium was within 10% of the dose from total tritium for each tissue, except for fat tissue which was 64%.