摘要
环境样品中90Sr分析的关键问题之一是Sr和Ca的有效分离,经优化浓HNO3沉淀法分离Sr和Ca的条件后,方法对Sr的回收率大于80%,测量源中Sr的化学纯度约为99%。用改进的HNO3沉淀法分析某污染高盐度地下水中90Sr活度浓度,分析结果与经典的发烟硝酸沉淀法相符,且Sr回收率和纯度稍好于发烟硝酸沉淀法,4个水文监测孔地下水中90Sr的活度浓度为1.21～6.24mBq/L。
The effective separation of Sr from Ca is one of the key problem in ana ysis of ^90Sr in environment samples. The recovery rate of Sr is more than 80% and the purity is about 99% after the separating condition of Sr from Ca is optimized. ^90Sr in high salinity ground- water was separated and measured by concentrated HNO3 precipitation method and fuming HNO3 precipitation method and the result was accordant. The recovery rate and the purity of Sr by concentrated HNOa precipitation method is better than by fuming HNOa precipitation method. The radioactivity concentration of ^90 Sr in four high salinity groundwater samples is found in the range 1.21-6.24 mBq/L by the present method.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2013年第2期116-120,共5页
Journal of Nuclear and Radiochemistry
关键词
SR
分离
浓HNO3沉淀
高盐度地下水
Sr
separation
concentrated HNO3 precipitation
high salinity groundwater
