【摘要】 分析连续光源火焰原子吸收法测定薏苡中铜、铁、钙和锰含量的过程,建立相应的数学模型。对样品测量过程中称量、稀释、定容、曲线拟合以及重复性等影响不确定度的因素进行了分析评定,最终计算合成和扩展各不确定度分量。本方法数理清晰,可对同时检测食品中多种金属元素的不确定度提供参考。更多还原

【Abstract】 A mathematical model was established to analyze the uncertainty for the simultaneous determination of copper(Cu), ferrum(Fe), cadmium(Ca) and manganese(Mn) in coix seeds by high resolution-continuum source-flame atomic absorption spectrometry(HR-CS-FAAS). In the estimation of uncertainty, the sample weighing, constant volume dilution, curve fitting, and repeatability that may affect the uncertainty of analytical data were taken into account. The uncertainty components were used to calculate the combined and expanded uncertainties. The method proposed in this study is concise and can provide a useful reference for evaluating the uncertainty in the simultaneous determination of several metal elements in food samples.更多还原