【摘要】 针对车用无铅汽油国家标准GB 17930—1999中对烯烃、芳烃和苯含量提出的明确限值要求,以及现用标准方法和其它分析技术在分析汽油组成时存在的问题,结合国外汽油分析的发展趋势及我国汽油生产的工艺和汽油组成分布特点,提出了一套新的多维气相色谱技术测定汽油中烯烃、芳烃和苯含量的方法,并研制了新的烯烃捕集阱,可捕集汽油中高达70％的烯烃,且具有良好的可逆性和使用寿命,提出的方法可以在12min内通过一次色谱进样实现汽油中烯烃总量、芳烃总量和苯含量的测定。试验结果与荧光指示剂吸附法(FIA,GB/T 11132—1989)相比具有很好的一致性,但分析速度和方法的再现性得到明显改善,试验成本也大大降低。更多还原

【Abstract】 A new method has been developed for determination of olefins, aromatics and benzene contents in gasoline by multi-dimension gas chromatography. The contents of olefins, aromatics and benzene of gasoline can be analyzed within 12min through one chromatographic run. A new type adsorption trap is used for removing olefins from a mixture with saturated hydrocarbons. The trap is reversible and has long service time that can be satisfying for analysis of over 70% olefins in gasoline. The accuracy of the said method is validated through comparing with standard sample and recovery experiments. The said method is fast more reproducible and lower test cost than flourescent indicator adsorption (FIA) method.更多还原