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建立了毛细管气相色谱法测定车用汽油中甲基苯胺类添加剂的方法,能够快速地分析N-甲基苯胺、对甲基苯胺、邻甲基苯胺、间甲基苯胺、苯胺和N,N-二甲基苯胺等6种甲基苯胺类化合物。在优化的色谱条件下,以苯乙酮为内标,汽油样品可直接进入气相色谱仪分析。结果显示,6种常见的甲基苯胺类添加剂在1—50g·L-1范围内呈良好线性,检出限为0.07—0.34g·L-1,样品的加标回收率为94.3%—117.1%,相对标准偏差为1.8%—3.9%。
A method of capillary gas chromatography for the determination of methylaniline in gasoline was developed. The method can rapidly analyze the methylaniline, p - methylaniline, o - methylaniline, m - methylaniline, aniline and N, N- Dimethylaniline and other 6 kinds of methylaniline compounds. Under optimized chromatographic conditions, with acetophenone as an internal standard, the gasoline sample can be directly analyzed by gas chromatography. The results showed that the six kinds of common methylaniline additives showed a good linearity in the range of 1-50g · L-1 with the detection limit of 0.07-0.34g · L-1 and the recoveries of the samples were 94.3% -117.1 %, Relative standard deviation of 1.8% -3.9%.