DETERMINATION OF TC-99 FROM THE ASPECT OF ENVIRONMENTAL-RADIOACTIVITY

被引：26

作者：

MATSUOKA, N ^{[1
]}

UMATA, T ^{[1
]}

OKAMURA, M ^{[1
]}

SHIRAISHI, N ^{[1
]}

MOMOSHIMA, N ^{[1
]}

TAKASHIMA, Y ^{[1
]}

机构：

[1] KYUSHU UNIV 33,FAC SCI,DEPT CHEM,HIGASHI KU,FUKUOKA 812,JAPAN

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1990年 / 140卷 / 01期

关键词：

D O I：

10.1007/BF02037364

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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. © 1990 Akadémiai Kiadó.

引用

页码：57 / 73

页数：17

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