Korea Institute of Nuclear Safety, 62 Gwahak-ro, Yuseong-gu, Daejeon, 34142, Republic of Korea.
Korea Institute of Nuclear Safety, 62 Gwahak-ro, Yuseong-gu, Daejeon, 34142, Republic of Korea.
Talanta. 2022 Mar 1;239:123141. doi: 10.1016/j.talanta.2021.123141. Epub 2021 Dec 10.
Since daily drinking water is one of the major source for the ingestion of radiotoxic Rn and Ra, the demand for a simple method to determine these two radionuclides has significantly increased. In the present study, a rapid, simple sequential analysis method for determining Rn and Ra in drinking water using a liquid scintillation counter was developed. The method employs solvent extraction and correction equations for the effect of native Rn for Ra analysis. Validation and examination of applicability for drinking water analysis were conducted using Rn-injected water and Ra standard source. Minimum required counting times for examining drinking water on Quantulus 1220 and Hidex 300SL were estimated via minimum detectable activity depending on the counting time. In addition, the correction method, including an equation for reducing analysis time by more than 10 days, was suggested based on the analytical results for different elapsed times between sampling and measurement.
由于日常饮用水是摄入放射性Rn 和 Ra 的主要来源之一，因此对一种简单方法来测定这两种放射性核素的需求显著增加。在本研究中，开发了一种使用液体闪烁计数器快速、简单的顺序分析方法来测定饮用水中的 Rn 和 Ra。该方法采用溶剂萃取和用于 Ra 分析的本底 Rn 校正方程。使用注入 Rn 的水和 Ra 标准源对饮用水分析的验证和适用性进行了检验。通过最小可探测活度，根据计数时间，估算了使用 Quantulus 1220 和 Hidex 300SL 对饮用水进行检查所需的最小计数时间。此外，还根据采样和测量之间不同时间间隔的分析结果，提出了一种包括减少分析时间超过 10 天的方程的校正方法。
