Abstract: GC-MS was used for the determination of 8 ester and aniline additives in gasoline. The sample was separated on a polar ionic liquid capillary column (SLB-1L 111). EI-SIM was adopted in MS. Acetophenone was used as the internal standard for quantification. The linear relationships were found between the peak area and the mass ratios of the 8 ester and aniline additives was in the range of 10-10 000 mg·kg-1,with detection limits in the range of 0.2-2.0 mg·kg-1. The recovery rates measured by standard addition method were in the range of 91.2%-111%,and RSD in the range of 0.18%-3.0%.