分光光度法测定食品中亚硝酸盐不确定度评估

Evaluation of Uncertainty in Determination of Nitrite in Food by Spectrophotometry

本文根据《测量不确定度评定与表示》(JJF 1059.1—2012)和《食品安全国家标准食品中亚硝酸盐与硝酸盐的测定》(GB 5009.33—2016),利用分光光度法对食品中亚硝酸盐的含量进行测定,建立数学模型对亚硝酸盐含量测定的不确定度来源分量进行计算、分析,食品中亚硝酸盐的测定结果可以表示为X=(11.2±0.70)mg·kg^(-1),k=2,为评价试验测量结果的真确性提供科学依据。

According to JJF 1059.1—2012 and GB 5009.33—2016,the content of nitrite in food is measured by spectrophotometry.Determine,establish a mathematical model to calculate and analyze the source of uncertainty in the determination of nitrite content.The determination result of nitrite in food can be expressed as X=(11.2±0.70)mg·kg^(-1),k=2,provide a scientific basis for evaluating the authenticity of the test measurement results.