一种改进的环境水样中^(60)Co的放射化学分析方法  

AN ADVANCED RADIOCHEMICAL METHOD FOR DETERMINATION OF ^(60)Co IN ENVIRONMENTAL WATER

作　　者：王治惠[1] 郑鸿[1] 程萍[1] 沙连茂[1] 

机构地区：[1]中国辐射防护研究院

出　　处：《辐射防护》1994年第5期384-387,共4页Radiation Protection

摘　　要：本文介绍了一种环境水样中￣（６０）Ｃｏ的放射化学分析方法。在常用的放化分析方法基础上，利用Ｃｏ与ＮＨ＿３形成络离子的特性，使Ｃｏ与Ｒｕ和Ｚｒ等核素分离，然后在９ｍｏｌ／ＬＨＣｌ介质中通过阴离子交换柱纯化，电沉积制源，在低本底β测量装置上测量。该方法对￣（５９）Ｆｅ等８种放射性核素的去污系数均达１０￣３以上；全程化学回收率与放化回收率基本一致，为７４％－８６％；计数２００ｍｉｎ，方法的探测下限为２．６ｍＢｑ／Ｌ。A radiochemical analysis procedure for ￣(60)Co in environmental water samples ispresented.In the procedure Co was separated from Ru,Zr and other radionuclides by com-plexing Co with amrnonia.Further decontamination was accomplished by passing through ananion exchange resin column.The solution after decontamination was evaporated to dry andelectrodeposition was carried out for source preparation.The activity measurement of ￣(60)Cosource was made with a low-background beta counter.The decontamination coefficients fornine impurity radionuclides exceeded 10￣3.The total chemical recovery,in agreement with ra-diochemical recovery,was 74%- 86%.The detection limit was 2.6 mBq/L.

关 键 词：^(60)Co 环境水样 放射化学分析 

分 类 号：X132[环境科学与工程—环境科学] O615[理学—无机化学]