| EDTA滴定法测定萤石中氟化钙含量的不确定度评定 |
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| 引用本文： | 王明丽. EDTA滴定法测定萤石中氟化钙含量的不确定度评定[J]. 广东化工, 2010, 37(10): 119-120 |
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| 作者姓名： | 王明丽 |
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| 作者单位： | 中冶集团武汉冶金建筑研究院有限公司,湖北武汉430081; |
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| 摘 要： | 依据测量不确定度的评定原理和方法,通过EDTA滴定法测定萤石中氟化钙含量的实例,按照测量不确定度的传播规律建立数学模型,分析不确定度分量的来源,讨论影响测定值不确定的各种因素,通过对各相对标准不确定分量计算,求出合成标准不确定度(uc)和扩展不确定度(U)。结果表明,影响测定不确定度的主要因素是EDTA溶液的标定。
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| 关 键 词： | 滴定法 不确定度评定 合成标准不确定度 扩展不确定度 |
Evaluation of Uncertainty for Determination of Calcium Fluoride Content in Fluorspar by EDTA Titration |
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| Wang Mingli. Evaluation of Uncertainty for Determination of Calcium Fluoride Content in Fluorspar by EDTA Titration[J]. Guangdong Chemical Industry, 2010, 37(10): 119-120 |
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| Authors: | Wang Mingli |
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| Affiliation: | Wang Mingli (Wuhan Metallurgical Construction Co., Ltd., of MCC Group, Wuhan 430081, China) |
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| Abstract: | Based on the method and principle of uncertainty evaluation, through the example of EDTA titration of the calcium fluoride content in Fluorite, establishing mathematical model according to the propagation law of determination uncertainty,analyzing the sources of uncertainty and discussing various factors that effect the uncertainty, calculating the combined standard uncertainty（uc） and expanded uncertainty （U）. The results showed that the main factor of effecting the measuring of uncertainty is the calibration of EDTA solution. |
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| Keywords: | titration evaluation of uncertainty combined standard uncertainty expanded uncertainty |
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