Determination of Ultra Low Nitrogen in Aromatic Hydrocarbons

This technical report details the methodology for analyzing ultra-low nitrogen content in various aliphatic and aromatic hydrocarbons using the multi EA 5100 system. The report outlines the challenges associated with nitrogen impurities in hydrocarbons, emphasizing the need for ultrapure materials in refinery and petrochemical processes. It describes the optimized vertical combustion method combined with HiPerSens chemiluminescence detection, which allows for concentration-independent total nitrogen (TN) determination. The document specifies the materials and methods used in the analysis, including sample preparation and calibration procedures. It also presents the instrumentation setup, including the fully automated sample introduction and the combustion process parameters. Results from the analysis of different hydrocarbon samples are summarized, demonstrating the effectiveness of the multi EA 5100 in achieving low detection limits and high reproducibility. The report concludes with the capabilities of the analyzer for various applications, highlighting its versatility in analyzing different matrix types.