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Determination of Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced Pressure Chemiluminescence Detection According to ASTM D7184 Application Note · multi EA 5100

Challenge

  • Fast, sensitive and reliable analysis of nitrogen contents in the ultra-trace range in different types of liquid aliphatic and aromatic hydrocarbons and their mixtures.

Solution

  • Optimized vertical combustion combined with HiPerSens chemiluminescence detection for concentration-independent TN determination.

Introduction

Liquid hydrocarbons play an important role in the refinery processes, the petrochemical, chemical and polymer industry, either as raw materials, process intermediates, or as end products. Regardless of their source or their further use, they all have in common that they need to be ultrapure. Undesired components like sulfur, nitrogen or chlorine compounds affect the production process and the quality of the final products, even if they occur only in the smallest traces.

Besides sulfur, nitrogen impurities are also known to negatively affect the performance and economic life of used catalyst materials (poisoning). The formation of unwanted by-products and a decreased product quality is an additional problem. To prevent this, the TN content has to be kept as low as possible, preferably below 100 µg/L, making a close nitrogen monitoring essential in process and quality control labs. High-temperature combustion in combination with chemiluminescence detection is the most effective method for this monitoring.

The multi EA 5100 is an analysis system which has been specifically optimized for this challenging task. Combining high-temperature combustion, a highperformance reaction gas dryer, and sensitive HiPerSens detection, it allows the determination of nitrogen traces as low as 10 µg/L.

Download the complete Application Note

Determination of Ultra Low Nitrogen in Aromatic Hydrocarbons (EN)

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multi EA 5100 for micro-elemental analysis Elemental analyzer for the determination of carbon, sulfur, nitrogen and chlorine contents in solids, liquids, and gases

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