Concentration of232Th,230Th and228Th in various tissues of Japanese subjects |
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| Authors: | Y Takizawa H Qingmei S Hisamatsu T Abe |
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| Institution: | (1) Environmental Agency, National Institute for Minamata Disease, Hama, 867 Minamata City, Kumamoto, Japan;(2) Laboratory of Industrial Hygiene, Ministry of Public Health, 100088 Beijing, China;(3) Akita University School of Medicine, Hondo 1-1-1, 010 Akita, Japan |
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| Abstract: | The concentration of232Th,230Th and228Th in various human tissues of Japanese subjects obtained at autopsies are reported. The tissue samples were weighed, spiked with234Th tracer and ashed by acid. The solution was dried on a hot-plate. Separation of thorium radionuclides was accomplished through cation-exchange resin chromatography and electrodeposition. The concentrations of thorium isotopes were measured by  -spectrometry. Thorium-232 and230Th concentrations were found to be highest in lung, followed by bone. The maximum concentration of228Th was in bone. The lowest concentrations of thorium isotopes were in muscle. |
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