利用液体闪烁计数法同时测定海产品样品中的 Pb 和 Po。
Simultaneous determination of Pb and Po in seafood samples using liquid scintillation counting.
机构信息
China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, China.
China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, China.
出版信息
J Environ Radioact. 2021 May;231:106553. doi: 10.1016/j.jenvrad.2021.106553. Epub 2021 Feb 17.
The measurement of Pb and Po in seafood samples has attracted tremendous interest because of their radiotoxicity. In this study, a fast and cost-efficient method for the simultaneous determination of Pb and Po in seafood samples by ultralow-level liquid scintillation counting after separation on a Sr•spec column was developed. The recoveries of Pb and Po were ~70% and ~85%, respectively. The minimum detectable activity of the proposed method for Pb and Po was 3.85 Bq/kg and 1.50 Bq/kg, respectively, which is suitable for the determination of Pb and Po in seafood samples. The radiochemical procedure was validated by measuring Pb and Po activity concentrations in IAEA-certified reference materials and successfully applied to shrimp and clam samples.
由于 Pb 和 Po 的放射性毒性，海产品样品中这两种元素的测量引起了极大的关注。本研究建立了一种快速、经济的方法，通过 Sr•spec 柱分离后，采用超低水平液体闪烁计数法同时测定海产品样品中的 Pb 和 Po。Pb 和 Po 的回收率分别约为 70%和 85%。该方法对 Pb 和 Po 的最小可检测活度分别为 3.85 Bq/kg 和 1.50 Bq/kg，适用于海产品样品中 Pb 和 Po 的测定。通过测量 IAEA 认证参考物质中的 Pb 和 Po 活度浓度对放射化学过程进行了验证，并成功应用于虾和蛤样品。
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