| 水氯化物的测定不确定度评定方法 |
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| 引用本文： | 范中南,孙宝利,陕红,张晓娟,汪聪慧,黄金丽.水氯化物的测定不确定度评定方法[J].分析试验室,2012(6):96-99. |
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| 作者姓名： | 范中南 孙宝利 陕红 张晓娟 汪聪慧 黄金丽 |
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| 作者单位： | 中国农业科学院农业环境与可持续发展研究所;农业部旱作节水农业重点实验室 |
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| 摘 要： | 根据GB/T 11896-1989《水质氯化物的测定硝酸银滴定法》国标方法对水中氯化物测定的不确定度进行评定。首先对不确定度主要来源进行识别,如测量重复性、标准NaCl的纯度、称量和定容、液体的转移、标准溶液在滴定和标定时滴定管的体积计量、温度等,然后建立数学模型,分别计算各输入量的不确定度分量和相对不确定度分量,合成各相对不确定度分量的方差和合成标准不确定度计算,得到测量结果的最终表示方式。
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| 关 键 词： | 不确定度评定 氯离子 水 硝酸银滴定法 |
The evaluation method of uncertainty in water chloride measurement |
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| FAN Zhong-nan,SUN Bao-li,SHAN Hong,ZHANG Xiao-juan,WANG Cong-hui,and HUANG Jin-li.The evaluation method of uncertainty in water chloride measurement[J].Chinese Journal of Analysis Laboratory,2012(6):96-99. |
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| Authors: | FAN Zhong-nan SUN Bao-li SHAN Hong ZHANG Xiao-juan WANG Cong-hui and HUANG Jin-li |
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| Institution: | 1,2(1.Institute of Environment and Sustainable Development in Agriculture,CAAS,Beijing 100081;2.Key Laboratory of Dryland Agriculture,Ministry of Agriculture,Beijing 100081) |
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| Abstract: | According to GB11896-1989 "water quality—determination of chloride—silver nitrate titration method",uncertainty in chloride content measurement was evaluated.The evaluation method was as follows: fist of all,to recognize the main source of uncertainty,including measurement repeatability,purity of NaCl standard,weighing and making up to volume,volume metering in liquid transfer,titration and standardization,and corresponding temperature effect on volume;then,to set up a mathematical model;to calculate the uncertainty of each input component and the relative uncertainty components;to synthesize the variance of relative uncertainty components;to estimate the combined standard uncertainty;finally to form a format of measurement result. |
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| Keywords: | Evaluation of uncertainty Chloride Water AgNO3 titrimetry |
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