| 酸碱滴定法测定天然石膏中碳酸盐的不确定度评定 |
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| 引用本文： | 陆丽君,蔡玉曼,侯鹏飞.酸碱滴定法测定天然石膏中碳酸盐的不确定度评定[J].岩矿测试,2008,27(3):211-214. |
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| 作者姓名： | 陆丽君 蔡玉曼 侯鹏飞 |
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| 作者单位： | 江苏省地质调查研究院,江苏南京,210018 |
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| 摘 要： | 对酸碱滴定法测定天然石膏中碳酸盐的结果进行不确定度评定。测量过程中的不确定度主要来源于样品制备过程引入的不确定度、滴定导致的不确定度、标定NaOH标准滴定溶液和HCl标准溶液引起的不确定度及重复性实验引起的不确定度等。合成各不确定度分量,并乘以扩展因子2得到扩展不确定度。对于CO2平均含量为8.66%（质量分数）的天然石膏样品,其扩展不确定度为0.17%。
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| 关 键 词： | 不确定度评定 酸碱滴定法 天然石膏 碳酸盐 |
| 文章编号： | 0251-5357(2008)03-0211-04 |
| 修稿时间： | 2007年8月27日 |
Uncertainty Evaluation of Analytical Results for Carbonate in Natural Gypsum Samples by Acid-base Titration Method |
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| LU Li-jun,CAI Yu-man,HOU Peng-fei.Uncertainty Evaluation of Analytical Results for Carbonate in Natural Gypsum Samples by Acid-base Titration Method[J].Rock and Mineral Analysis,2008,27(3):211-214. |
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| Authors: | LU Li-jun CAI Yu-man HOU Peng-fei |
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| Institution: | (Geological Survey of Jiangsu Province,Nanjing 210018,China) |
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| Abstract: | The measurement uncertainty of the analytical results for carbonate in natural gypsum samples by acid base titration method was evaluated and the mathematic model for uncertainty expression was established. The total uncertainty mainly came from the sub-uncertainties of sample preparing process, titration process, calibration of NaOH and HCl titrants, repetitive experiments, reagent blanks, etc. The extended uncertainty for the method was obtained from the combined uncertainty multiplied by extended factor of 2. When the average content of CO2 in the samples was 8.66%, the expanded uncertainty was 0.17%. |
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| Keywords: | uncertainty evaluation acid ase titration natural gypsum carbonate |
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