依据JJF 1059-1999《测量不确定度评定与表示》及JJG939-2009《原子荧光光度计》检定规程评定了原子荧光光度计测锑检出限的测量结果不确定度。建立了评定检出限的测量结果不确定度的数学模型,分析了各不确定度分量,并计算了合成不确定度和测量结果的扩展不确定度。 According to JJF 1059-1999 “Evaluation and Expression of Measurement Uncertainty” and JJG939-2009 “Atomic Fluorescence” verification procedures to assess the atomic fluorescence photometer to measure the detection limit of uncertainty of measurement results. The mathematic model of the uncertainty of the measurement results was established, the components of the uncertainty were analyzed, and the uncertainty of the synthesis and the expanded uncertainty of the measurement results were calculated.