利用锶特效树脂和正比计数器同时快速分析^89 Sr和^90 Sr

Simultaneous and Rapid Analysis of^89Sr and^90Sr by Sr Specific Resin and Proportional Counter

本文建立了利用锶特效树脂分离后采用正比计数器进行2次测量从而同时并快速获得^89Sr和^90Sr含量的方法,研究了^90Y的生长因子及^89Sr/^90Sr活度比对^89Sr和^90Sr测量结果的影响。结果表明,增大^90Y的生长因子,更有利于准确获得^89Sr和^90Sr的活度。将本方法应用于^89Sr/^90Sr活度比为0.22~21.8样品中^89Sr和^90Sr的分析,测量值与掺标值的相对偏差小于±30%;不确定度分析表明,一个核素的不确定度将随另一核素活度比或活度的增加而增加。IAEA能力验证样品的分析结果显示,^89Sr和^90Sr测量值与指定值的相对偏差最大为7.44%,证实了本方法的准确性。

In this paper,a simultaneous and rapid analysis method of^89Sr and^90Sr was established by proportional counter to measure twice after separation using Sr specific resin.The effects of^90Y growth factor and^89Sr/^90Sr activity ratio on the measured values of^89Sr and^90Sr were studied.The results show that increasing^90Y growth factor is more conducive to obtain the activities of^89Sr and^90Sr.This method was applied to the analysis of^89Sr and^90Sr in samples with^89Sr/^90Sr activity ratio ranging from 0.22 to 21.8,and the relative deviation between the measured value and the standard value is less than±30%.The uncertainty analysis shows that the uncertainty of one nuclide will increase with activity ratio or activity of another nuclide.The maximum relative deviation of^89Sr and^90Sr between the measured value and the standard value is 7.44%,which proves the accuracy of this method by the analysis of IAEA proficiency test samples.