生物样品中锶-90分析的不确定度评定

以茶叶样品锶-90分析为例,详细介绍了生物样品中锶-90分析不确定度的来源,数学模型的建立,标准不确定度的合成,不确定度分量以及扩展不确定度的计算。深入讨论了各不确定度分量对总不确定度的贡献。结果显示：该茶叶样品锶-90活度的分析结果为（68.8±2.6）Bq/kg,该样品的不确定度主要来自？计数的测量、仪器探测效率和样品化学回收率。...

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Published in辐射研究与辐射工艺学报 Vol. 34; no. 1; pp. 59 - 64
Main Author 陈飞 尹亮亮 孔祥银 邵宪章 申宝鸣 吉艳琴
Format Journal Article
LanguageChinese
Published 中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室北京 100088 2016
Subjects
不确定度
生物样品
萃取色层法
锶-90
Uncertainty
生物样品
Sr-90
不确定度
萃取色层法
锶-90
Biological samples
Extraction chromatography
Online AccessGet full text
ISSN1000-3436
DOI10.11889/j.1000-3436.2016.rrj.34.010701

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Summary:以茶叶样品锶-90分析为例,详细介绍了生物样品中锶-90分析不确定度的来源,数学模型的建立,标准不确定度的合成,不确定度分量以及扩展不确定度的计算。深入讨论了各不确定度分量对总不确定度的贡献。结果显示：该茶叶样品锶-90活度的分析结果为（68.8±2.6）Bq/kg,该样品的不确定度主要来自？计数的测量、仪器探测效率和样品化学回收率。
Bibliography:CHEN Fei YIN Liangliang KONG Xiangyin SHAO Xianzhang SHEN Baoming JI Yanqin （China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, China CDC, Beijing 100088, China）
In order to completely express the results of Sr-90 analysis, this paper presents the uncertainty evaluation of Sr-90 analysis in biological samples. Determination of Sr-90 in tea ash was taken as an example, the origins of uncertainty were discussed in detail and the mathematical model was established. Uncertainty components, standard uncertainty and expanded uncertainty were respectively calculated as well. Contributions of uncertainty components were also compared. The results showed that the radioactivity of St-90 in the tea ash was （68.8±2.6） Bq/kg （k=-2）, and the uncertainty mainly originated from Y-90 beta-counting, detection efficiency of equipment and chemical recovery of the method.
Sr-90, Uncertainty, Biological samples, Extraction chromatography
31-1258/TL
ISSN:1000-3436
DOI:10.11889/j.1000-3436.2016.rrj.34.010701