通过原子吸收光度法重复测定矿石中的铜,建立不确定度评定数学模型。分析了测量过程中的不确定度主要来源于标准物质引入的不确定度,样品制备的不确定度,重复试验的不确定度。当铜平均含量为100μg/g时,评定其不确定度为0.54μg/g。 The atomic absorption spectrophotometry was used to measure the copper in the ore repeatedly, and the mathematic model of the uncertainty was established. Analysis of the uncertainty in the measurement process mainly comes from the introduction of the standard material uncertainty, sample preparation uncertainty, repeated testing uncertainty. When the average copper content is 100 μg / g, the uncertainty is 0.54 μg / g.