在海水中检测的方法开发:选择性提取和采用活性树脂制备样本
Ji-Young Park1, Dayeong Lee1, Ranhee Park2
1Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon 30434, Republic of Korea.
Journal of chromatography. A
|December 1, 2025
概括
一种新的方法使用微波消化和专用树脂快速确定海水中的,将分析时间缩短到7小时. 这为海洋环境监测和应急响应提供了高通量解决方案.
科学领域:
- 环境化学环境化学
- 放射化学 放射化学是指辐射化学.
- 分析化学 分析化学
背景情况:
- 在海水中常规的测定是耗时的 (1-2天) 和劳动密集型,由于多个共同降水步骤.
- 现有的方法在分析大量海洋样本时面临速度和效率的限制.
- 精确监测海洋环境中的同位素对于核安全和环境保护至关重要.
研究的目的:
- 开发一种快速,高效和可靠的分析方法,用于在大量海水样本中测定.
- 通过减少分析时间和劳动力来克服传统共降技术的局限性.
- 建立一个多功能平台,用于应急响应和日常环境监测海洋系统中的动因化物.
主要方法:
- 微波辅助酸性消化,CaF2/LaF3共沉降和TEVA提取色谱与动因子选择性树脂 (AN-树脂) 的整合.
- 优化使用海水预平衡239Pu和242Pu作为内部标记物,以有效地分离Pu和维护氧化状态.
- 使用20升海水样本进行验证,实现了高回收率和精度.
主要成果:
- 获得了高回收率 (86.2 ± 4.4%的239Pu,90.5 ± 4.5%的242Pu) 具有很好的分析准确性 (96.7%) 和精度 (3.1% RSD).
- 显著减少总预处理时间约为7小时,包括2小时的预度步骤.
- 通过实验室间比较和现场应用确定了低检测极限 (0.03-0.05 μBq/kg),并证实了方法的稳定性.
结论:
- 开发的方法提供了一种高通量,可靠的替代方案,用于在大量海水中进行常规分析.
- 它大大减少了分析时间和劳动力,同时保持了高准确度和精度.
- 该方法适用于应急准备和常规环境监测海洋生态系统中的和其他活性化物.
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