通过冷原子荧光光度法重复测定样品中的汞建立不确定度评定数学模型,系统分析和量化不确定度各分量。分析了测量过程中的不确定度主要来源于样品制备的不确定度、标准物质引入的不确定度、曲线拟合中产生的不确定度以及重复试验的不确定度,保证了测量结果的可靠性和可比性。 The determination of mercury in the sample was repeated by cold atomic fluorescence spectrometry to establish a mathematical model for the evaluation of uncertainty, and to systematically analyze and quantify the components of the uncertainty. It is analyzed that the uncertainty in the measurement process mainly comes from the uncertainty of sample preparation, the uncertainty of introduction of standard materials, the uncertainty in curve fitting and the uncertainty of repeated experiments, which ensures the reliable measurement results Sexuality and comparability.