| 电位滴定法测定白酒总酯的不确定度分析 |
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| 引用本文： | 刘妙芬,邱佩丽,丁怡,黄秋婷,彭程. 电位滴定法测定白酒总酯的不确定度分析[J]. 酿酒科技, 2012, 0(2): 39-42 |
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| 作者姓名： | 刘妙芬 邱佩丽 丁怡 黄秋婷 彭程 |
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| 作者单位： | 广州市酒类检测中心,广东广州,510160 |
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| 摘 要： | 根据测量不确定度的评定原理和方法,对电位滴定法测定白酒中总酯含量过程的不确定度分量进行分析和定量,分析了测量重复性、取样、标准滴定液的标定过程、滴定管和摩尔质量等因素对测量不确定度的影响,建立了不确定度的数学模型。计算得到总酯的合成标准不确定度为uc=0.00836 g/L,扩展不确定度为U=0.0167 g/L;k=2。
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| 关 键 词： | 不确定度 电位滴定法 白酒 总酯 |
Evaluation of the Uncertainty in the Determination of Total Esters Content in Liquor by Automatic Potentiometric Titration |
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| LIU Miaofen,QIU Peili,DING Yi,HUANG Qiuing and PENG Cheng. Evaluation of the Uncertainty in the Determination of Total Esters Content in Liquor by Automatic Potentiometric Titration[J]. Liquor-making Science & Technology, 2012, 0(2): 39-42 |
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| Authors: | LIU Miaofen QIU Peili DING Yi HUANG Qiuing PENG Cheng |
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| Affiliation: | (Guizhou Wine Products Detection Center,Guangzhou,Guangdong 510160,China) |
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| Abstract: | The uncertainty components in the determination of total esters content in liquor by potentiometric titration were analyzed and quantified according to the evaluation principles of uncertainty.The effects of measurement repeatability,sampling,preparation process of standard solution,burette and molar weight etc on the uncertainty were also investigated to establish the mathematical model of uncertainty.The combined standard measurement uncertainty of total ester content was calculated to be 0.00836 g / L and the expanded uncertainty was 0.0167g / L(k = 2). |
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| Keywords: | uncertainty potentiometric titration method liquor total esters |
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