关键词: 关键词：超高效液相色谱法, 乳粉, 烟酰胺, 不确定度评定

Abstract: Abstract: The measurement uncertainty was evaluated for the determination of nicotinamide in milk powder by ultra performance liquid chromatography. According to JJF 1059.1—2012 Evaluation and Expression of Uncertainty of Measurement, a mathematical model was established, and the source of each uncertainty component in the mathematical model was analyzed and calculated. The results show that the uncertainty of nicotinamide determination results mainly comes from the dilution and constant volume process of standard solution. In addition, the expanded uncertainty was 197 μg/100g (k=2) when the average result of nicotinamide was 5007 μg/100g.

Key words: Key words: ultra-performance liquid chromatography, Milk powder, Nicotinamide, uncertainty evaluation