Abstract: Gas chromatography-nitrogen chemiluminescence detector (GC-NCD) has gradually become one of the most widely used analytical method for the determination of nitrogen species in petroleum refining products due to its equimolar response to nitrogen compounds in samples. The qualitative analysis of GC-NCD mainly refers to the qualitative determination of standard sample or GC-MS after enrichment and extraction, and external standard method is generally used for quantitative analysis. In this paper, the practical application in the analysis of GC-NCD in petroleum refining process was summarized, and some main applications of gas, gasoline, diesel fuel and some additives were presented.

Key words: gas chromatography- nitrogen chemiluminescence detector, nitrogen compounds, gasoline, diesel, gas