| 电位滴定法测定脱硫剂中N-甲基二乙醇胺质量分数 |
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| 引用本文： | 时文,李应文,陈菲,马会霞,胡雪生,高飞.电位滴定法测定脱硫剂中N-甲基二乙醇胺质量分数[J].石化技术与应用,2021,0(1):57-60. |
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| 作者姓名： | 时文 李应文 陈菲 马会霞 胡雪生 高飞 |
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| 作者单位： | 1. 中国石油石油化工研究院，北京 102206；2. 中国石油大学 化学工程与环境学院，北京 102249 |
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| 摘 要： | 采用电位滴定法测定了脱硫剂中N-甲基二乙醇胺（MDEA）质量分数，考察了该方法的精密度和准确度，并与手动滴定法进行了对比。结果表明:当样品中MDEA质量分数为20%~100%时，电位滴定法重复性实验的相对标准偏差为0.064%～0.110%，再现性实验结果的绝对偏差不大于0.409%，加标回收率不低于98.876%，其精密度、准确度均优于手动滴定法。
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| 关 键 词： | 电位滴定法 手动滴定法 脱硫剂 N-甲基二乙醇胺 相对标准偏差 绝对偏差 加标回收率 |
Determination of N-methyldiethanolamine mass fraction in desulfurizer by potentiometric titration method |
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| SHI Wen,LI Ying-wen,CHEN Fei,MA Hui-xia,HU Xue-sheng,GAO Fei.Determination of N-methyldiethanolamine mass fraction in desulfurizer by potentiometric titration method[J].Petrochemical Technology & Application,2021,0(1):57-60. |
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| Authors: | SHI Wen LI Ying-wen CHEN Fei MA Hui-xia HU Xue-sheng GAO Fei |
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| Affiliation: | (Petrochemical Research Institute,PetroChina,Beijing 102206,China;College of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China) |
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| Abstract: | The mass fraction of N-methyldietha-nolamine in desulfurizer was determined by potentiometric titration method,furthermore,its precision and repeatability were investigated and compared with the manual titration method.The results showed that when the mass fraction of MDEA in the samples were between 20%to 100%,the repeatability experiment′s relative standard deviation of potentiometric titration method were between 0.064%-0.110%;the absolute deviation of reproducibility experiment results was less than 0.409%;and the standard addition recovery rate was not less than 98.876%.The precision and accuracy of potentiometric titration were both better than that of the manual titration. |
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| Keywords: | potentiometric titration method manual titration method desulfurizer N-methyldie-thanolamine relative standard deviation absolute deviation standard addition recovery rate |
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