β计数法测定水环境中的^(131)I  

Determination of ^(131)I in Water Environment by β Counting Method

作　　者：彭安国[1] 周鹏[2] 肖静水[1] 赵力[2] 赵志伟[1] 

机构地区：[1]南华大学核资源与核燃料工程学院,湖南衡阳421001 [2]国家海洋局南海环境监测中心,广东广州510300

出　　处：《南华大学学报（自然科学版）》2012年第1期10-13,23,共5页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(40806031);南华大学科研基金资助项目(WT-KF-2010-01;2007×QD36)

摘　　要：131I是核医学应用中非常重要的核素,同时也是核泄漏事故中释放的主要裂变核素之一,其准确测定对于环境保护具有非常重要的意义.本文详细描述了不同水环境中的131I的β计数测定法,并对海水、放射性废水等不同水环境样品进行了检测,结果表明:1)本研究中碘的化学回收率为85.39%～94.47%,平均值为90.90%;2)海水样品平行样中131I的体积比活度为0.673 4～0.735 1 Bq/m3,放射性废水平行样中131I的体积比活度为16.80～17.43 Bq/m3,平行样研究结果表明此方法的重现性很好.^131I is a very important nuclide applied in nuclear medicine ;also it is one of the most important fission nuclides released from nuclear leak accidents, so accurate determination of ^131I is very important for environment protection. First, we described β counting method in detail for ^131I in different water environment;Second,we determined ^131I in ocean water and radioactive waste water by this method. The experimental results showed that 1 ） The full chemical recovery rates of iodine varied from 85.39% to 94.47% and the average is 90.90% ;2） The volume activities of ^131Iin four parallel samples of ocean water were 0. 673 4- 0. 735 1 Bq/m3, while in radioactive waste water, the volume activities of ^131I were 16.80 -17.43 Bq/m3 ;the results of parallel sample determination suggested that reproducibility was good for this method.

关 键 词：β计数 131I 水环境 

分 类 号：TL816.2[核科学技术—核技术及应用] X837[环境科学与工程—环境工程]