测定压片糖果中铜含量的不确定度分析

Uncertainty Analysis of Copper Content in Pressed Candy

采用无火焰原子吸收分光光度法测定压片糖果中铜含量,确定影响测定过程中不确定度的因素,通过对各个不确定度分量的计算合成得出压片糖果中铜含量的相对不确定度和扩展不确定度。结果表明,该压片糖果中铜含量为0.34±0.02 mg·kg^-1(k=2)。

The copper content in pressed candy was determined by flameless atomic absorption spectrometry,and the factors influencing the uncertainty were determined.The relative uncertainty and expanded uncertainty of copper content in pressed candy were obtained by calculating and synthesizing each uncertainty component.The results showed that the content of copper in the pressed candy was 0.34±0.02 mg·kg^-1(k=2).