气态放射性碘的制备与控制研究

Methods for Generation and Control of Gaseous Radioactive Iodine

气态131I的产生与控制是建立气载放射性碘测量标准的技术关键之一。根据氧化还原反应原理由碘盐溶液生成气态单质碘,通过调节放射性碘盐活度的方式可控制气态放射性碘的产量。以Fe2(SO4)3为氧化剂,在设定的反应条件下,平均产率可达到78.7%±8.7%(95%置信区间),且较为稳定。

The generation of gaseous^131 I is a key technique for building standard reference of gaseous131 I activity concentration. In this study,gaseous iodine（ I2） is produced from iodide solution through redox reaction. The production of radioactive gaseous iodine can be adjusted by regulating the activity of the iodide solution in the redox reaction. The productivity of gaseous iodine was determined to be about 78. 0% ± 7. 9%（ 95% confidence interval） which is relatively stable when using Fe2（ SO4）3as oxidant under certain reaction condition.