Sr树脂在气溶胶210Pb、210Bi和210Po联合分析中的初步应用

Sr树脂在气溶胶²¹⁰Pb、²¹⁰Bi和²¹⁰Po联合分析中的初步应用

摘要: 气溶胶中²¹⁰Pb、²¹⁰Bi和²¹⁰Po的活度浓度处于不平衡状态，本工作对3种核素联合分析进行了方法设计，并采用标准溶液对方法进行了验证。方法验证了Sr树脂对Pb-Bi-Po的分离。依据三种核素的回收率²¹⁰Bi(约97%)＞²¹⁰Po(约93%)＞²¹⁰Pb(约89%)、PbSO₄中²¹⁰Bi的生长曲线及BiOCl的衰变曲线，可以确定Sr树脂对3种核素的分离效果较好。Sr树脂在气溶胶²¹⁰Pb、²¹⁰Bi和²¹⁰Po中的联合分析应用研究，可以应用于探究气溶胶中Pb-Bi-Po不平衡现象，为气溶胶分析提供技术方法。

Abstract: The activity concentration of ²¹⁰Pb, ²¹⁰Bi and ²¹⁰Po in air is radioactive disequilibrium. In this paper, the method of joint analysis was designed about these three radionuclides, and was proved by being used standard solution. The technique is proved to be feasible for Pb-Bi-Po separation by Sr resin. The separation effect of these radionuclides is most satisfactory by the recovery of ²¹⁰Bi(about 97%)>²¹⁰Po(about 93%)>²¹⁰Pb(about 89%), and the growth curve of PbSO₄, and the decay curve of BiOCl. The application of research about joint analyses of ²¹⁰Pb, ²¹⁰Bi and ²¹⁰Po in aerosol using Sr resin can explore the Pb-Bi-Po imbalance in the aerosol, providing technical support for aerosol source identification.