超高效液相色谱法测定地表水中多环芳烃实验分析测量不确定度评定

An Evaluation of the Measuring Uncertainty in Determination of Polycyclic Aromatic Hydrocarbons(PAHs) in the Surface Water by the Ultra-Performance Liquid Chromatography(UPLC)

对超高效液相色谱法测定地表水中16种多环芳烃过程的不确定度进行了评定。通过数学模型分析并计算测试过程中的不确定度分量,最后计算出相对合成标准不确定度和相对扩展不确定度。据分析,在引起不确定度的诸多因素中,回收率引入的不确定度分量最大,其次是测量重复性和标准物质引入的不确定度。

The study is to evaluate the uncertainty of measuring 16 Polycyclic Aromatic Hydrocarbons （PAHs） in the surface water with UPLC through the analysis and calculation by the mathematical modeling. The uncertainty of the relative synthesis standard and relative expansion are finally calculated. The analysis reveals that among the dif ferent causes of the uncertainty, the recovery is the biggest contributor, that is followed by the repeat of measuring and reference material.