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不确定度的测量和评定能更好更准确地反应检测方法是否符合工作要求,也是实验室必须重视的问题;检测结果的准确性和可靠性在很大程度上取决于其不确定度的大小,测量不确定度是对检测结果质量的定量表征[1]。本文利用原子荧光光谱法测定奶粉中砷,分析实验过程中各种不确定度来源,计算不确定结果。1测定原理与定量数学模型依据GB/T5009.11-2003食品中总砷和无机砷的测定第一法氢化物原子荧光光度法[2],试样经
Uncertainty measurement and evaluation can better and more accurately reflect the detection method meets the requirements of the work, but also the laboratory must pay attention to the problem; the accuracy and reliability of the test results to a large extent depends on the size of its uncertainty , Measurement uncertainty is the quantitative characterization of the quality of test results [1]. In this paper, the determination of arsenic in powdered milk by atomic fluorescence spectrometry, analysis of various sources of uncertainty in the experiment, calculation of uncertain results. 1 Determination of the principle and quantitative mathematical model based on the determination of total arsenic and inorganic arsenic in food GB / T5009.11-2003 first method hydride atomic fluorescence spectrometry [2], the sample by