| 原子荧光光谱法测定土壤硒的不确定度评定 |
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| 引用本文： | 陕红,;汪聪慧,;戎婷婷,;刘丹丹,;刘亚利,;封朝晖. 原子荧光光谱法测定土壤硒的不确定度评定[J]. 现代科学仪器, 2014, 0(5): 133-137 |
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| 作者姓名： | 陕红, 汪聪慧, 戎婷婷, 刘丹丹, 刘亚利, 封朝晖 |
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| 作者单位： | [1]农业部农业环境重点实验室/中国农业科学院农业环境与可持续发展研究所,北京100081; [2]山西大同大学生命科学学院,大同037009 |
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| 基金项目： | 公益性行业（农业）科研专项经费“优质高效富硒农产品关键技术研究与示范”（201303106） |
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| 摘 要： | 采用原子荧光光谱法对土壤样品中硒进行测定,分析了影响测量不确定度的主要来源,对样品消解过程中的样品称量、消解、定容体积、曲线拟合等影响不确定度的分量进行了分析。结果表明,不确定度分量的主要来源为消解样品所引入的不确定度,其次为重复性试验工作曲线拟合产生的不确定度,其余因素的贡献均较小。按照JJF-1059-1999的规定对不确定度分量进行合成,最终给出扩展不确定度为0.087mg/kg,土壤硒含量测定结果的表示方式为（0.161±0.087）mg/kg（k=2）。
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| 关 键 词： | 土壤硒 不确定度 原子荧光光谱法 |
Evaluation of Measurement Uncertainty for Dtermination of Selenium in Soiil by Atomic Fluorescence Spectrometry |
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| Affiliation: | Shan Hong,Wang Conghui,Rong Tingting,Liu Dandan,Liu Yali,Feng Zhaohui (1Key Laboratory for Agricultural Environment,Ministry of Agriculture,Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences,Beijing, 100081 China;2School of Life Science,Shanxi Datong University, Datong,037009 ) |
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| Abstract: | Selenium in soil samples was measured by using atomic fluorescence spectrometry, and the impact of major source of measurement uncertainty was discussed.Uncertainty compound such as sample weighing,the process of digestion,the volume size,curve fitting were analyzed. The results showed that the key factors of uncertainty of selenium content measurement and important source of indefinite component are the process of digestion, repeatability of standard curve is the second source of uncertainty. The effect of other factors is very small. According to JJF 1059-1999,uncertainty components were synthesized and the final expanded uncertainty was given as 0.087mg/kg.The express mode of soil selenium is as （0.161± 0.087）mg/kg（k=2）. |
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| Keywords: | Selenium in soils Uncertainty Atomic fluorescence spectrometry |
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