Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China.
Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China.
J Environ Radioact. 2024 Sep;278:107515. doi: 10.1016/j.jenvrad.2024.107515. Epub 2024 Aug 11.
I has been extensively utilized in nuclear medicine, resulting in its widespread detection in coastal algal samples due to its discharge. Therefore, it is essential to monitor I in the coastal algal samples. γ-spectrometry is an expeditious method for measuring I, but this method requires the pretreatment of the algal sample. The effect on I in the algal sample during the oven-drying treatment is unclear. In this study, the Laminaria japonica Areschoug and Sargassum vachellianum Greville were collected at two locations and analyzed for I using γ-spectrometry. Additionally, the content of iodine was measured using an Inductively Coupled Plasma-Mass Spectrometer (ICP-MS) to clarify the effect of I loss during drying treatment at different temperatures. The results demonstrated that the dried Laminaria and Sargassum samples had calculated I activity concentration relative standard deviations (RSDs) of 6.34 % and 16.31 %, respectively, while the fresh samples exhibited RSDs of 11.70 % and 15.57 %. Additionally, the iodine content RSDs in the dried samples were 9.19 % for Laminaria and 10.34 % for Sargassum. Significantly, discrepancies in I activity concentration between the fresh and dried Laminaria and Sargassum were 5.4 % and 10.3 %. These findings indicate that the temperature factor in drying has no effect on I loss in Laminaria and Sargassum in the range of 70 °C-110 °C.
它已被广泛应用于核医学领域，由于其排放，导致沿海藻类样本中广泛检测到碘。因此，监测沿海藻类样本中的碘是至关重要的。γ谱法是测量碘的一种快捷方法，但该方法需要对藻类样本进行预处理。在烘干处理过程中，碘在藻类样本中的变化尚不清楚。在这项研究中，采集了两种地点的海带和马尾藻，并用 γ 谱法对其进行碘分析。此外，还使用电感耦合等离子体质谱仪（ICP-MS）测量了碘的含量，以阐明在不同温度下干燥处理过程中碘损失的影响。结果表明，干燥的海带和马尾藻样品的计算碘活度浓度相对标准偏差（RSD）分别为 6.34％和 16.31％，而新鲜样品的 RSD 分别为 11.70％和 15.57％。此外，干燥样品中碘含量的 RSD 分别为海带的 9.19％和马尾藻的 10.34％。重要的是，新鲜和干燥的海带和马尾藻之间的碘活度浓度差异分别为 5.4％和 10.3％。这些发现表明，在 70°C-110°C 的范围内，干燥过程中的温度因素对海带和马尾藻中碘的损失没有影响。
