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放射性可追溯参考材料的生产,用于测量环境中的放射性污染物

L Chambon¹, S Gupta², H Isnard²

¹Université Paris-Saclay, CEA, List, Laboratoire National Henri Becquerel (LNE-LNHB), 91120, Palaiseau, France.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

|September 26, 2025

概括

这项研究开发了两个新的放射性环境参考材料 (RMs) 用于质谱. 这些材料提高了环境放射性测量和质量控制的准确性.

科学领域:

环境科学环境科学
分析化学分析化学
核科学核科学核科学

背景情况:

可追溯到国际单位系统的放射性环境参考材料 (RMs) 的有限可用性.
环境样本的现有RM缺乏全面的表征,特别是质谱的同位素比.
需要可靠的RM来进行环境放射性监测的常规质量控制.

研究的目的:

开发和描述两个候选放射性环境参考材料 (RMs).
为基于质谱的环境监测提供可追溯的RM,用于例行质量控制.
评估液体和固体RMS在环境应用中的同质性和适用性.

主要方法:

通过加注北海海水来制备液体RM.
固体RM的制备,使用合成sol-gel方法,使用尖的二氧化前体.
使用马射线光谱学和质谱学进行同质性评估 (瓶间和瓶内).

主要成果:

液体RM表现出较低的亚样本变化 (<1%),这是由于测试的放射性核素的瓶内变化.
通过马射线光谱测试,固体RM显示241Am的瓶间变化具有统计学意义 (<1%).
在固体RM中对238U和239Pu的质谱测量显示出更高的变化率 (~5%),主要来自瓶内贡献.

结论:

开发的液体和固体RM显示了环境放射性测量的常规质量控制潜力.
同质性评估证实了这些RM的适用性,并确定了瓶内变异的贡献.
这些RM有助于提高使用质谱的环境放射性分析的准确性和可追溯性.

关键词:

环境监测环境监测环境监测一致性一致性质谱测量质量谱测量质量控制质量控制参考材料参考材料是指参考材料.

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