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本文通过使用Varian Aerograph 2740色谱仪,Varian MAT311双聚焦高分辨质谱仪,单级、双级微孔玻璃和单级玻璃喷嘴分离器以及SS-100MS数据系统,分析了二十多个石油和化工产品,举出某些典型实例,讨论了毛细管柱和填充柱与质谱联接所用分离器的效率,包括在不同载气流量时的分离因子A和样品收率Y。在毛细管柱的选择方面,对于壁涂渍毛细管柱(WCOT),担体涂渍开管柱(SCOT)和弹性熔融石英毛细管柱(FSOT)的特点、柱容量和分辨率作了比较。在高温下采用石墨接头的密封材料比硅橡胶有明显的优点。对于计算机数据处理系统有关参数的选择,包括采样次数、扫描速度、分辨能力、频带宽度与采样速率间的关系作了讨论,列举了曾用WCOT柱子鉴定汽油中111个组分,以及用SCOT柱分析催化裂化柴油中碱性氮化物129个组分的实例。
In this paper, more than 20 oil and chemical products were analyzed using the Varian Aerograph 2740, the Varian MAT311 dual-focus high resolution mass spectrometer, single-stage, two-stage microporous glass and single stage glass nozzle separators and the SS-100MS data system Some typical examples are given, discussing the efficiency of separators for capillary columns and packed columns with mass spectrometry, including separation factor A and sample yield Y at different carrier gas flows. In terms of the choice of capillary columns, the characteristics of column-coated capillary columns (WCOT), support-coated open tubular columns (SCOT) and elastic fused silica capillary columns (FSOT) were compared. Column capacities and resolution were compared. Sealing materials using graphite joints at elevated temperatures have significant advantages over silicone rubber. For computer data processing system parameters, including the number of sampling, scanning speed, resolution, frequency bandwidth and the relationship between the sampling rate are discussed, have cited the WCOT column identification of 111 components in gasoline and SCOT column An example of analyzing 129 components of basic nitride in FCC diesel was analyzed.