| HG-AFS法测定土壤样中硒的不确定度评定 |
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| 引用本文： | 简红霞,刘梯楼.HG-AFS法测定土壤样中硒的不确定度评定[J].安徽农业科学,2012(7):4217-4219. |
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| 作者姓名： | 简红霞 刘梯楼 |
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| 作者单位： | 1. 邵阳市环境保护监测站,湖南邵阳,422000
2. 邵阳市医学高等专科学校,湖南邵阳,422000 |
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| 摘 要： | 目的]对测量土壤样品中硒的不确定度进行评定。方法]采用氢化物发生-原子荧光光谱法(HG-AFS)对土壤样品中的硒进行测定,根据《测量不确定度评定与表示》对其不确定度进行分析。结果]测量不确定度主要来源于标准溶液配制、曲线拟合、样品制备、重复测量,并且得出标准不确定度和扩展不确定度。结论]当土壤中硒的含量为0.642 mg/kg时,其扩展不确定度为0.036 mg/kg(k=2)。
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| 关 键 词： | HG-AFS 不确定度 硒 土壤 |
Uncertainty Evaluation of Determination of Selenium in Soil by HG-AFS |
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| Institution: | JIAN Hong-xia et al(Shaoyang Environmental Monitoring Station,Shaoyang,Hunan 422000) |
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| Abstract: | Objective] The uncertainty of the measurement of selenium in soil was evaluated.Method] Selenium in soil samples were measured by using hydride generation atomic fluorescence spectrometry(HG-AFS).The uncertainty was analyzed according to Evaluation and Expression of Uncertainty in Measurement.Result] The impacts of major source of measurement uncertainty were preparation of standard solution,curve fitting,samples preparation and measurement repeatability,and the standard and expanded uncertainty were gained.Conclusion] When the selenium content was 0.642 mg/kg in soil,the expanded uncertainty reached 0.036 mg/kg(k=2). |
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| Keywords: | HG-AFS Uncertainty Selenium Soil |
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