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SH/T 0606-2005在测定柴油中的芳烃含量时,如果采用附录B方法对样品预分离,影响主要表现为饱和烃组分和芳烃组分含量测定的影响和预分离效果对质谱分析的影响,前者的影响更大。预分离时的冲洗溶剂用量要根据样品中的芳烃含量进行调整。质量歧视效应对饱和烃组分和芳烃组分含量测定的影响很大。最好采用冷柱头进样。如果采用分流进样,合适的分流比为20∶1。采用二十八烷作内标要比用正三十烷作内标好。当需要改变进入柱子的样品量时,最好直接增加进样量,而不要采用减小分流比的方式。
SH / T 0606-2005 In the determination of aromatics content in diesel oil, if the method of Appendix B is used to pre-separate the sample, the main influence is on the determination of the content of saturated hydrocarbon component and aromatic component and the influence of pre-separation on mass spectrometry , The former has a greater impact. The amount of flushing solvent used for pre-separation is adjusted according to the aromatic content in the sample. The effect of mass discrimination has a great influence on the determination of the content of saturated and aromatic components. It is best to use cold stigma injection. If split injection is used, the appropriate split ratio is 20: 1. Using octacosane for internal standard than n-triacontane as internal standard is good. When you need to change the amount of sample entering the column, it is best to increase the injection directly instead of reducing the split ratio.