相关实验视频

Updated: Jul 19, 2025

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

Published on: May 20, 2019

开发用于海洋沉积物中分析质量控制的参考材料

Y Jung¹, S H Lee¹, M J Lee¹

¹Environmental Radioactivity Safety Team, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea.

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

|August 16, 2023

概括

开发了一种新的海洋沉积物参考材料,用于精确的238和234分析. 这确保了核电厂周围可靠的环境放射性监测.

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:

自福岛核电站事故以来,公众对放射性污染的担忧增加了.
环境放射性调查对于监测核电站安全至关重要.
在这些调查中,分析结果的可靠性是必不可少的,并且经常引起争论.

研究的目的:

开发一种用于质量控制的认证参考材料 (RM).
为了确保在海洋沉积物中精确分析-238 (238U) 和-234 (234U).
支持可靠的环境放射性监测.

主要方法:

根据ISO指南31,34和35编制的海洋沉积物参考材料.
在RM上使用多次酸消化和融合进行的均性测试.
使用经过验证的方法分析238U和234U度.

主要成果:

开发的海洋沉积物RM证明了同质性.
确定了238U和234U的认证参考值:分别为43.0 ± 1.7 Bq kg−1 (k=1) 和41.5 ± 1.9 Bq kg−1 (k=1).
RM为实验室间比较提供了可靠的标准.

结论:

新的海洋沉积物RM适用于238U和234U分析的质量控制.
这种RM将提高环境放射性监测数据的可靠性.
它还将在核科学和环境监测方面的能力测试计划中具有价值.

关键词:

环境样本环境样本在ISO指南中,ISO指南是ISO指南.质量控制质量控制参考材料参考材料是指参考材料.U的同位素是U的同位素.

更多相关视频

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Published on: July 10, 2015

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Published on: July 1, 2016

相关概念视频

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...