色谱2017，Vol.35Issue(5)：551-557,7.DOI:10.3724/SP.J.1123.2016.11018
气相色谱法测定车用汽油中含氧化合物和苯胺类化合物
Determination of oxygenates and anilines in motor gasoline by gas chromatography
摘要
Abstract
A test method for the determination of oxygenates and anilines in motor gasoline was established using a gas chromatograph (GC) with heart-cut accessories and two chromatographic columns.A nonpolar DB-1 column (30 m×0.32 mm×1.0 μm) was used as the pre-column and a polar GS-OxyPLOT or CP-Lowox column (10 m×0.53 mm×10 μm) was used as the analysis column.In a test run, the gasoline sample was first separated according to the boiling points on the nonpolar column.By solenoid valve switching, the compounds of boiling points below 2-hexanone were cut to the GS-OxyPLOT or CP-Lowox column, whereas the other compounds were put through a restrictor to a flame ionization detector (FID).The oxygenates were separated from the hydrocarbons on the GS-OxyPLOT or CP-Lowox column and detected by the FID.When a second run was performed, the solenoid valve switching time was set at the point when m-methyl aniline was all eluted from the nonpolar column into the polar column.Anilines were separated from hydrocarbons and oxygenates on the GS-OxyPLOT or CP-Lowox column.Dimethoxy-ethane was used as the internal standard for quantitation.Methyl tert-butyl ether (MTBE), methanol, methylal, sec-butyl acetate, ethyl acetate, aniline, N-methyl aniline and o/m/p-methyl aniline in motor gasoline were detected and quantitated.The linear ranges were 0.01%-10% (mass fraction) with recoveries of 86.0%-102.6%.The method provides an effective way for quality control of motor gasoline.关键词
气相色谱/中心切割/含氧化合物/苯胺类化合物/甲缩醛/车用汽油Key words
gas chromatography (GC)/heart-cut/oxygenates/anilines/methylal/motor gasoline分类
化学化工引用本文复制引用
李长秀..气相色谱法测定车用汽油中含氧化合物和苯胺类化合物[J].色谱,2017,35(5):551-557,7.基金项目
国家标准化管理委员会标准化项目(20131688-T-469).National Standardization Project of Standardization Administration of the People's Republic of China (No.20131688-T-469). （20131688-T-469）
