分光光度法测定乳粉中胆碱含量的不确定度评定

根据《婴幼儿食品和乳品中胆碱的测定》测定乳粉中胆碱的含量,建立分光光度法测定乳制品中胆碱的不确定度数学模型,通过分析其测定的过程,确定影响结果的不确定度的主要分量来源,进行逐一分析并计算,评定出测量结果的合成标准不确定度和扩展不确定度。通过探讨这类测定方法的不确定度计算方法和步骤,建立一种简单、适用的测量不确定度的评估方法。

Evaluation of the Uncertainty in Spectrophotometric Determination of Choline Content in Milk Powder

According to “the determination of choline in infant food and milk products”, to determine the choline content in milk powder, establish a mathematical model for the uncertainty in spectrophotometric determination of choline in dairy products, through the analysis in the process of the determination, the main uncertainty components were analyzed and obtained the synthetic standard uncertainty and expanded uncertainty of the measurement results. By discussions of calculations and steps for this kinds of determination, a simple and applicable method of evaluating measurement uncertainty was established.