全二维气相色谱-飞行时间质谱对催化裂化汽油的定性与定量分析

发布时间：2018-02-03 06:23

本文关键词： 催化裂化汽油全二维气相色谱-飞行时间质谱定性与定量分析　出处：《分析化学》2017年04期 　论文类型：期刊论文

【摘要】：采用全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)对催化裂化汽油全馏分进行了定性与定量分析,建立了相应的分析方法。结果表明,汽油族组成中的烷烃、烯烃、环烷烃、芳烃在全二维点阵谱图中呈分区域、带状的分布特点。GC×GC-TOF MS根据催化裂化汽油组分内分子的沸点及极性差异对其进行两个维度分离,极大地避免了普通色谱法分析过程中沸点相似化合物共流的弊端,实现催化裂化汽油组分的精确分离和准确定性分析。通过引入响应因子,修正了不同性质的烃类在电离源上电离效率的差异,使得TOF对催化裂化汽油族组成的定量结果与普通气相色谱法的定量结果的相关性较好,且应用GC×GC-TOF MS方法获得了催化裂化汽油更为精确的族组成信息。GC×GC-TOF MS为催化裂化汽油精确表征提供了一种有效方法。
[Abstract]:Two dimensional gas chromatography-time-of-flight mass spectrometry (GC 脳 GC-TOF MS) was used to analyze the total fractions of FCC gasoline, and the corresponding analytical method was established. The alkanes, alkenes, cycloalkanes and aromatics in the gasoline group are subdivided into two dimensional lattice spectra. The characteristics of zonal distribution. GC 脳 GC-TOF MS separated FCC gasoline components according to their boiling point and polarity. The common flow of boiling point similar compounds in the process of general chromatographic analysis was avoided greatly, and the accurate separation and qualitative analysis of the components of FCC gasoline were realized. The response factor was introduced. The difference in ionization efficiency of hydrocarbons with different properties was corrected, which made TOF have a good correlation with the quantitative results of FCC gasoline group composition and that of conventional gas chromatography. The more accurate group information of FCC gasoline was obtained by GC 脳 GC-TOF MS. GC 脳 GC-TOF MS provided an effective method for the accurate characterization of FCC gasoline.
【作者单位】：中国石油大学重质油国家重点实验室;
【基金】：国家自然科学基金(Nos.U1462205,21476263) 中央高校基本科研业务费专项资金(Nos.14CX06116A,16CX05010A)资助项目~~
【分类号】：TE626.21;O657.63
【正文快照】： 1引言汽油是现今使用量最大的燃料之一,随着环保法规的不断升级,汽油产品标准日趋严格[1~3]。汽油组成成分是决定汽油产品质量的根本因素,汽油组分的精确表征是炼厂进行操作参数调整,生产合格汽油的重要保证。目前,普遍采用普通气相色谱-氢火焰离子化检测方法(GC-FID法,以下简

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