Abstract: A method for the separation and determination of nitrogen compounds in catalytic gasolines by gas chromatography-nitrogen chemiluminescence detection (GC-NCD) was established. The effects of the flow rate of carrier gas and the oven temperature on the resolution were studied. More than 20 nitrogen compounds, including amines, pyridine, aniline, 2-methyl aniline, 3-methyl aniline, 4-methyl aniline, quinoline, and indole, in catalytic gasoline were identified based on the retention time of some pure nitrogen compounds and by gas chromatography-mass spectrometry. The relative standard deviations of the peak areas of main nitrogen compounds in a catalytic gasoline sample were less than 2.5% and the detection limits for nitrogen were 1.0 mg/L under the chosen conditions. The linear ranges were 1.0~100 mg/L nitrogen for each nitrogen compound. The correlation coefficients were more than 0.998. The method can be successfully applied for the determination of each nitrogen compound in different catalytic gasolines.

Key words: catalytic gasolines , distribution, gas chromatography-mass spectrometry （GC-MS）, nitrogen compounds, gas chromatography-nitrogen chemiluminescence detection