气相色谱-场电离-高分辨飞行时间质谱联用法测定火箭煤油的烃类组成

Determination of Composition of Hydrocarbons in Rocket Kerosene by Hyphenation of GC with Field Ionization-High Resolution Time of Flight-Mass Spectrometry

采用气相色谱分离与场电离和高分辨飞行时间质谱法(FI-TOF-HRMS)联用研究了火箭煤油的烃类组成、类型分布和碳数分布。分析时将煤油样品直接进样。分析结果表明:此火箭煤油中烃类的碳数分布在C8~C16之间;含直链烷烃量占19.9%(w/%,下同),含总环烷烃量达77.7%(其中包括一环烷烃42.9%,二环烷烃33.4%),含芳烃类杂质(均为单环芳烃)含量仅占2.4%;样品中未测得含硫、氮及氧杂环化合物的杂质。该分析结果与气相色谱-质谱法的分析结果完全一致。

A study on the composition of hydrocarbons as well as their distributions of classification and carbon numbers in rocket kerosene was made by the application of GC and FI-TOF-HRMS in hyphenation.Sample of rocket kerosene was introduced directly into the instrument for analysis.It was shown by the analytical results that:①the carbon number of the hydrocarbons present in the kerosene sample was in the range of C8-C16;② content(w/%)of alkanes amounted to 19.9%;total cyclic hydrocarbons amounted to 77.7%(induding 42.9%of monocyclic hydrocarbons and 33.4% of bicyclic hydrocarbons;amount of arenes(all as monocylic arenes)attained only to 2.4%;③ no S-,N-and O-containing heterocyclic compounds present as impurity were found in the kerosene.The above results were found to check very well with the results obtained by GC-MS.