气溶胶中Sr-90检测结果异常分析

Analyse the Abnormal Results of Sr-90 in Aerosol

本文介绍了2019年福州监测站点气溶胶中Sr-90异常数据的分析及处理工作。结果表明,气溶胶Sr-90分析过程中,由于样品中Bi-210较Sr-90活度浓度高的多,因此要特别注意Bi-210的消除;采取过柱前和过柱后,分两次加入硫化钠除铋。放射性核素测量过程中,为了验证相关准确性,将测量计数衰变规律与理论衰变规律进行比较。

In this paper,the analysis and processing method of the abnormal data about the Fuzhou aerosol Sr-90 in 2019 was descibed.The results showed during the process of aerosol Sr-90 analysis,the elimination of interference of Bi-210 should be pay attention to because the activity concentration of Bi-210 is much higher than that of Sr-90 in the same sample.The bismuth sulfide can be removed by adding sodium sulfide to the solution sample twice,before the beginning of and after the end of the column chromatography process.In the process of radionuclide measurement,the relative accuracy can be verified by comparing the counting decay law with the theoretical decay law.