Execution standards

SH/T 0657-2007 Determination of Trace Nitrogen in Liquid Petroleum Hydrocarbons (Oxidative Combustion and Chemiluminescence Method);

SH/T 0704-2001 Determination of nitrogen content in petroleum and petroleum products (boat injection chemiluminescence method);

GB/T 17674-1999 Determination of nitrogen content in crude oil and its products (chemiluminescence method);

ASTM D5762-2010 Test Method for Nitrogen in Petroleum and Petroleum Products by Ship Inlet Chemiluminescence Method;

ASTM D4629-2010 Determination of Trace Organic Compounds in Liquid Petroleum Hydrocarbons by Injection/Insertion Oxidation Fuel and Chemiluminescence Method

Standard test method for compound nitrogen;

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ASTM D6069-2001 Determination of Trace Nitrogen in Aviation Hydrocarbons by Oxidative Combustion and Reduction Pressure Chemiluminescence Detection Method

Standard test methods.

Detection principle:₃The WMTN-5000 chemiluminescence nitrogen analyzer is used to quantitatively convert nitrogen compounds into nitric oxide (NO) after the sample is introduced into a high-temperature cracking furnace and undergoes oxidative cracking. The reaction gas is carried by the carrier gas and dried and dehydrated before entering the reaction chamber, where it is mixed with ozone (O) from an ozone generator₂）The gas undergoes a reaction, and some nitric oxide is converted into excited nitrogen dioxide (N0)₂）When N0

When transitioning to the ground state, photons are emitted, and the light signal is received and amplified by a photomultiplier tube. The light signal is converted into an electrical signal, which is then amplified by an amplifier, processed by a computer, and converted into an electrical signal proportional to the intensity of light. Under certain conditions, the chemiluminescence intensity in the reaction is proportional to the amount of nitric oxide produced, and the amount of nitric oxide is proportional to the total nitrogen content in the sample. Therefore, the total nitrogen content in the sample can be determined by measuring the chemiluminescence intensity. This instrument is currently the most advanced nitrogen element synchronous analyzer in China, widely used to detect the total nitrogen content in liquid, solid, or gas samples. The key components of the system are imported, ensuring reliable performance of the entire machine. Especially in the determination of total nitrogen content in paraffin oil, diesel, kerosene, gasoline, lubricating oil, fuel oil, liquefied gas, and natural gas, it has been widely used.