caa a22 4500 465730655 CHVBK 20180323111740.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF02037364 doi (NATIONALLICENCE)springer-10.1007/BF02037364 Determination of technetium-99 from the aspect of environmental radioactivity [Elektronische Daten] [N. Matsuoka, T. Umata, M. Okamura, N. Shiraishi, N. Momoshima, Y. Takashima] A radioanalytical procedure has been developed for the determination of99Tc in environmental samples. The procedure consists of precipitation, solvent extraction, ion exchange, electrodeposition and radiation measurement. Rhenium was used as a non-isotopic carrier of99Tc. On the basis of 3σ counting error, the detection limits were 4.9·10−5 Bq/l, 7.4·10−3 Bq/kg wet and 7.4·10−2 Bq/kg dry for water, biota and soil samples, respectively. Sea water, seaweeds (brown algae) and soils were collected to evaluate the present levels of99Tc in Japan. The level of99Tc in sea water was ca. 1·10−4 Bq/l around Japan. Among the seaweeds (brown algae), Ishige okamurai showed the highest concentration of 5.8·10−2 Bq/kg wet tissue and the highest concentration factor of 583. The level of99Tc in the organic rich surface soil was ca. 1 Bq/kg dry soil in Fukuoka. Akadémiai Kiadó, 1990 Matsuoka N. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut Umata T. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut Okamura M. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut Shiraishi N. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut Momoshima N. Department of Chemistry, Faculty of Science, Kyushu University, 33, Hakozaki, Higashiku, 812, Fukuoka, Japan aut Takashima Y. Department of Chemistry, Faculty of Science, Kyushu University, 33, Hakozaki, Higashiku, 812, Fukuoka, Japan aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 140/1(1990-05-01), 57-73 0236-5731 140:1<57 1990 140 10967 https://doi.org/10.1007/BF02037364 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02037364 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matsuoka N. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut NATIONALLICENCE 700 1- Umata T. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut NATIONALLICENCE 700 1- Okamura M. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut NATIONALLICENCE 700 1- Shiraishi N. Kyushu Environmental Evaluation Association, 1-10-1, Matsukadai, Higashiku, 813, Fukuoka, Japan aut NATIONALLICENCE 700 1- Momoshima N. Department of Chemistry, Faculty of Science, Kyushu University, 33, Hakozaki, Higashiku, 812, Fukuoka, Japan aut NATIONALLICENCE 700 1- Takashima Y. Department of Chemistry, Faculty of Science, Kyushu University, 33, Hakozaki, Higashiku, 812, Fukuoka, Japan aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 140/1(1990-05-01), 57-73 0236-5731 140:1<57 1990 140 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer