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为了完整地对测量结果质量有一个定量的描述,以便使人们能了解其可靠性,并能对测量结果之间,测量结果与标准或规范中指定参考值之间进行比较,引入了“不确定度”的概念。不确定度是用来表征合理地赋予被测量值的分散性,与测量结果相联系的参数。本文依据不确定度的定义及评估的意义,详细对食品中1,2-丙二醇的测定方法及实验条件进行叙述,主要介绍对标品纯度、质量、体积、峰面积、重复性、回收率的不确定度分量进行分析、计算的全部过程,论述含乳饮料中1,2丙二醇的测定方法的不确定度评估结果,并形成最终的评估报告。
In order to have a quantitative description of the quality of the measurement in a complete way so that one can understand its reliability and to compare the measurement results with the specified reference values in a standard or specification, The degree of certainty "concept. Uncertainty is used to characterize the dispersion that is reasonably assigned to the measured value, which is related to the measurement result. Based on the definition of uncertainty and the significance of the assessment, this paper describes the determination of 1,2-propanediol and the experimental conditions in detail, mainly introduces the purity, quality, volume, peak area, repeatability and recovery rate Uncertainty component of the analysis, calculation of the entire process, discusses the determination of 1,2-propylene glycol in milk drinks, the uncertainty of the assessment results, and the formation of the final assessment report.