高分子聚合物材料中邻苯二甲酸酯类化合物的测量不确定度评定

Uncertainty Evaluation in Measurement of Phthalates Compounds in Polymer Material

根据GB/T 39560.8-2021/IEC 62321-8:2017《电子电气产品中某些物质的测定第8部分:气相色谱-质谱法(GC-MS)与配有热裂解/热脱附的气相色谱-质谱法(Py-TD-GC-MS)测定聚合物中的邻苯二甲酸酯》的检测原理和方法,结合JJF 1059-1999《测量不确定度评定与表示》的基本程序,以邻苯二甲酸二正丁酯为例,评定了气相色谱-质谱法测定电子电气产品中高分子聚合物材料里的7种邻苯二甲酸酯类化合物的不确定度。通过系统分析检测过程的不确定度来源,建立数学模型量化各不确定度分量,从而评定不确定度,并计算了扩展不确定度,提高了检测数据的可靠性,也为不良结果的原因分析提供了帮助。

According to the basic principle and method given in GB/T 39560. 8-2021/IEC 62321-8:2017“Determination of certain substances in electrical and electronic products-Part 8:Phthalates in polymers by gas chromatography-mass spectrometry(GC-MS), gas chromatography-mass spectrometry using a pyrolyzer/thermaldesorption accessory(Py/TD-GC-MS)”,the components of uncertainty in the measuring process were studied and analyzed as the procedure for uncertainty assessment described in JJF 1059-1999Evaluation and Expression of Uncertainty in Measurement and CNAS-GL06 Guidance on Evaluating the Uncertainty in Chemical Analysis,taking Di-n-butyl phthalate for example. By systematically analyzing the uncertainty sources in the testing process,a mathematical model is established to quantify each uncertainty component to evaluate the uncertainty,and the extended uncertainty is calculated. These improves the reliability of the test data and also provide help for the cause analysis of adverse results.