超高效液相色谱法测定配制酒中糖精钠的不确定度分析

目的分析超高效液相色谱法测定配制酒中糖精钠的不确定度。方法依据JJF1059.1-2012《测量不确定度评定与表示》和CNSA-GL06-2018《化学分析中不确定度的评估指南》中的规定和要求,分析糖精钠含量测定过程中的各种不确定度的来源。结果当配制酒中糖精钠的含量为0.105g/kg时,其扩展不确定度为0.010g/kg(k=2)。结论建立标准曲线的过程中引入的不确定度最大,其次是标准溶液,样品前处理过程以及测量重复性实验引入的不确定度相对较小。

Uncertainty analysis for the determination of saccharin sodium in mixed wine by ultra performance liquid chromatography

Objective To analyze the uncertainty for the determination of saccharin sodium in mixed wine by ultra performance liquid chromatography. Methods According to the regulation and requirement of JJF 1059.1-2012 Evaluation and expression of uncertainty in measurement and CNSA-GL06 Guidance on evaluating the uncertainty in chemical analysis, various sources of uncertainty in the measurement process of saccharin sodium content were analyzed. Results When the content of saccharin sodium in the prepared wine was 0.105 g/kg, the expanded uncertainty was 0.010 g/kg (k=2). Conclusion The greatest uncertainty was introduced during the establishment of the standard curve, followed by less uncertainty in the standard solution, the uncertainty introduced by sample pretreatment and measurement repeatability was relatively small.