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投稿时间：2015-09-02
投稿时间：2015-09-02
中文摘要: 根据JJF1059.1-2012《测量不确定度评定与表示》和CNAS-CL07-2011《测量不确定度的要求》中的有关规定，建立荧光分光光度法测定婴幼儿乳粉中VC含量不确定度的数学模型。对数学模型中各不确定度分量的来源进行分析，并计算了各分量的不确定度及合成标准不确定度，最终给出实验的扩展不确定度。通过评定，婴幼儿乳粉中VC含量为（91.8±2.04）mg/100g，k=2，p=95%。，影响测定结果的主要因素是标准溶液的配制、仪器荧光分光光度计、回收率因子及试样前处理等。
Abstract:According to the relevant regulations of JJF1059.1-2012Evaluation and Expression of Uncertainty in Measurement and CNAS-CL07-2011Requirement for Measurement Uncertainty，a mathematical model was established of fluorescence spectrophotometry infant milk powder vitamin C content measurement uncertainty evaluation.Factors contributing to the uncertainty were analyzed，calculate of each component of uncertainty and combined standard uncertainty，the final test results to expanded uncertainty.Through assessment，the content of vitamin C in infant milk powder was（91.8±2.04）mg/100g，k=2，p=95%.The major sources of uncertainty affecting determination results were preparation of standard solutions，sample pre-treatment and instrument fluorescence spectrophotometer.
keywords: infant formula vitamin C uncertainty
文章编号：201616038 中图分类号： 文献标志码：
基金项目:
| Author Name | Affiliation |
| ZHANG Cui-cui1，ZHANG Yun1，2，LIU Shu-ming | East University of Heilongjiang，Harbin 150066，Heilongjiang，China，2.Northeast Agricultural University，Harbin 150030，Heilongjiang，China |
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