| 微库仑法测定汽油中氯的不确定度评定 |
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| 引用本文： | 徐臻瑾,宋昌盛,张永夏.微库仑法测定汽油中氯的不确定度评定[J].广州化工,2013(24):114-117. |
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| 作者姓名： | 徐臻瑾 宋昌盛 张永夏 |
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| 作者单位： | 太仓出入境检验检疫局综合技术服务中心,江苏太仓215400 |
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| 摘 要： | 通过分析微库仑法测定汽油中氯含量操作过程，对氯含量测定结果的不确定度进行了评定。不确定度主要来源于从仪器测得样品中的氯含量的不确定度；样品密度的不确定度以及回收率的不确定度。分析和量化各不确定度分量，发现回收率对不确定度的贡献最大。当汽油样品氯含量为16．0mg／kg时，其扩展不确定度为1．1mg／kg（k=2）。
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| 关 键 词： | 不确定度 微库仑 氯 汽油 |
Evaluation of Uncertainty in Measurement of Chloride in Gasoline by Microcoulometry Method |
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| Affiliation: | XU Zhen -jin, SONG Chang - sheng, ZHANG Yong - xia (Comprehensive Technical Service Centre of Taicang Entry- Exit Inspection and Qurantine Bureau, Jiangsu Taicang 215400, China) |
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| Abstract: | The measurement uncertainty of chloride in gasoline by microcoulometry was evaluated based on the analysis of the operation process. The main sources of the uncertainty were the sample concentration of chloride measured by the instrument, the density of the sample and the measurement recovery. Based on analysis and quantification of uncertainty components, it was found that the uncertainty was mainly originated from measurement recovery. The chloridne content in a gasoline sample was 16. 0 mg/kg while the expanded uncertainty was 1.1 mg/kg（ k =2）. |
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| Keywords: | uncertainty microcoulometry chloride gasoline |
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