摘要
为了对高频红外吸收法测定铀矿石中有机碳含量的测量结果进行不确定度评定,本文通过建立数学模型,分析了不确定度的来源,包括样品称量、标准工作曲线测量结果、空白试验及重复测量所引入的不确定度。通过计算得到了各个不确定度分量,并合成得到了标准不确定度和扩展不确定度。结果表明,当碳含量为4.82%时,测量结果的扩展不确定度为0.354%(k=2)。对各不确定度分量进行比较,不确定度主要来源为样品称量和曲线拟合。
In order to evaluate the uncertainty of the measurement results of the organic carbon content in uranium ores determined by the high-frequency infrared absorption method,this paper establishes a mathematical model and analyzes the sources of uncertainty,including the uncertainty introduced by sample weighing,the uncertainty introduced by the measurement results of the standard working curve,the uncertainty introduced by the blank test,and the uncertainty introduced by repeated measurements.The individual uncertainty components are calculated,and the standard uncertainty and the expanded uncertainty are synthesized.The results show that when the carbon content is 4.82%,the expanded uncertainty of the measurement result is 0.354%(k=2).By comparing the individual uncertainty components,it is found that the main sources of uncertainty are sample weighing and curve fitting.
作者
张建梅
邓长生
ZHANG Jianmei;DENG Changsheng(Geologic Party No.216,CNNC,Urumqi 830011,China)
出处
《山东化工》
2025年第14期153-154,179,共3页
Shandong Chemical Industry
基金
中国核工业地质局项目“新疆察布查尔县都拉塔地区铀矿普查(编号:202305-1)”资助。
关键词
铀矿石
有机碳
不确定度评定
红外吸收法
高频红外碳硫分析仪
uranium ore
organic carbon
uncertainty evaluation
infrared absorption method
high-frequency infrared carbon-sulfur analyzer
