原子荧光法测定饮用水中硒含量的不确定度分析

Analysis of uncertainty in detection of Selenium in drinking water by atomic fluorescence spectrometry

目的:进行原子荧光法测定饮用水中硒含量的不确定度分析。方法:采用《生活饮用水卫生规范》中原子荧光法测定饮用水硒含量。应用测量不确定度理论,对原子荧光法测定硒的不确定度进行分析。结果:得出测定饮用水中的硒的含量的扩展不确定度U95=0.5599μg/L。结论:在检验方法学研究中进行不确定度分析,能了解被测量真值所处范围及这个范围的大小。该方法不确定度分析在实际工作中有较大的实用价值。

Objective:To analyze the uncertainty in detection of selenium in drinking water by atomic fluorescence spectrometry. Methods:Using atomic fluorescence spectrometry to determine the content of Selenium in drinking water of 《Sanitary Standards For drinking water》. The uncertainty was evaluated based on the theory of uncertainty determination. Result:The relative uncertainty of detection of selenium in drinking water by atomic fluorescence spectrometry was U 95 =0.5599 μg/L. Conclusion:Carrying on the uncertainty analysis can see the measure truth live in range and the size of range in studying of inspection methodology, so this method of uncertainty analysis is of practical value in the real work.