DETERMINATION OF TC-99 IN ENVIRONMENTAL-SAMPLES BY ANION-EXCHANGE AND LIQUID-LIQUID-EXTRACTION AT CONTROLLED VALENCY

被引：33

作者：

CHEN, QJ

DAHLGAARD, H

HANSEN, HJM

AARKROG, A

机构：

[1] Health Physics Department, Ris/o National Laboratory

来源：

ANALYTICA CHIMICA ACTA | 1990年 / 228卷 / 01期

关键词：

D O I：

10.1016/S0003-2670(00)80493-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method for collecting 99Tc from 200-2-400 1 of sea water by anion exchange has been developed. Further decontamination of 103.106Ru was achieved by repeated evaporation of RuO4 from 0.05 M sulphuric acid at 100° C, followed by extraction of TcO-4 into 5% triisooctylamine-xylene at controlled valency. 110mAg was precipitated as AgCl. An average overall radiochemical yield of 70% was found for Tc. Decontamination factors were between 3 105 and 2 107 for Ru and 2 105 for Ag. A method for determining 99Tc in seaweed by wet ashing and simple extraction into 5% triisooctylamine-xylene is also presented. © 1990.

引用

页码：163 / 167

页数：5

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