【摘要】 论述了乙烯、丙烯中多元标准混合气体气相色谱分析方法 ,给出了分析条件及方法的相对标准偏差 ,并就该标准气体配制的均匀性、稳定性的变化结果进行了分析与考察 ,同时对标准气体的性能及不确定度进行了评价更多还原

【Abstract】 Gas chromatography was applied to the analysis of candidate CRM′s of multicomponent gas mixtures in ethylene or propylene, which was selected as the base gas component individual for each set of the candidates (composing three samples in each set). According to a prescribed programme, 17 organic gaseous compounds were added to each of the gas mixture sample, and a definite quantity of each of the components added was weighed accurately. The GC conditions were studied thoroughly and the Al 2O 3/KCl and Al 2O 3/Na 2SO 4 capillary columns were found to be satisfactory for the separation of the 17 components, and the RSD′s found in the determination of these components were ≤±1.2%. The stability, homogeneity and reliability of these candidate CRM′s were also studied and observed in detail. An evaluation of the uncertainty of the analytical results and also of the performance of the samples was also given.更多还原