气相色谱—质谱法测定食用槟榔中对羟基苯甲酸乙酯的测量不确定度评定

根据JJF 1059.1—2012《测量不确定度评定与表示》的规定,对气相色谱—质谱联用法测定食用槟榔中对羟基苯甲酸乙酯含量的不确定度进行分析,找出影响不确定度的各种因素,计算合成不确定度及扩展不确定度,为其测定方法的探讨和检测报告的评估提供依据。不确定评估结果显示,回收率分量、气相色谱—质谱联用仪分量、测量重复性分量这3项引起的不确定度分量对合成不确定度影响较大。

Uncertainty evaluation on determination of p-hydroxy benzoic acid ethyl ester in edible betel nut by gas chromatography mass spectrometry

To analyze the uncertainty evaluation of measurement results for p-hydroxy benzoic acid ethyl ester in edible betel nut by Gas chromatography mass spectrometry, the various factors were found, which affected uncertainty according to JJF 1059.1-2012 Evaluation and Expression Uncertainty in Measurement, and evaluated the synthetic uncertainty and expanded it, gave the uncertainty range of the measured value. It was provided support for methods discussing and evaluation on test reports. It is showed that three kind of factorshave significant contribution to the uncertainty synthesis, such as recovery factor, gas chromatography mass spectrometry and measurement repeatability.