An in-depth look at the principles and trends of Oxygen, Nitrogen and Hydrogen Analyzer

The Oxygen, Nitrogen and Hydrogen Analyzer (ONH-2018) is a widely used instrument in the fields of material science, chemical analysis and other fields, and its measurement range is extremely wide. We will discuss in depth the working principle of oxygen, nitrogen and hydrogen analyzer as well as its development trend in this paper.

Working Principle

The working principle of the Oxygen, Nitrogen and Hydrogen Analyzer involves the processes of combustion of the sample, gas separation and detection. The following are the main working steps:

Sample handling: The sample is first weighed and placed into the sample port. To prevent atmospheric oxygen and nitrogen from entering the furnace system, a carrier gas is used for flushing to ensure the accuracy of the analysis process.

Degassing of the graphite crucible: The graphite crucible is degassed in a pulsed furnace with the aim of minimizing autochthonous contamination, e.g. residual hydrogen. After a stabilization phase, the sample enters the crucible and melts.

Gas release: Oxygen from the sample reacts with carbon in the graphite crucible to form carbon monoxide, while nitrogen and hydrogen are released as monomers.

Oxidation reaction: The carrier gas and sample gas pass through a dust filter and into a copper oxide catalytic furnace where carbon monoxide is oxidized to carbon dioxide.

Measurment: The carbon dioxide enters the infrared cell for oxygen content determination. The measured gas is introduced into a chemical reagent tube, where carbon dioxide and water are removed by the chemical reagent and the nitrogen content is determined by means of a thermal conductivity detection cell.

Hydrogen measurement process: When measuring hydrogen, the carrier gas is changed to nitrogen and the sample gas is passed through the Schutz reagent instead of the copper oxide catalyst. This step is to measure the hydrogen content more accurately.

Development trend

Automatic technology: As technology continues to advance, Oxygen, Nitrogen and Hydrogen analysers are moving towards higher levels of automation to improve analysis efficiency and reduce operator intervention.

Increased accuracy and sensitivity: Researchers are constantly striving to improve the accuracy and sensitivity of oxygen, nitrogen and hydrogen analysers to meet the more stringent requirements for material components.

Versatile design: Future Oxygen, Nitrogen and Hydrogen analysers are likely to be more versatile, with the ability to measure multiple elements at the same time, expanding their applications.

Environmental protection and energy saving: the future development trend will pay more attention to environmental protection and energy saving in terms of energy consumption and waste disposal in the process of using the instrument.

Online monitoring technology: with the development of the Internet, the oxygen, nitrogen and hydrogen analyser may move towards the direction of online monitoring technology to achieve remote real-time monitoring and data transmission.

All in all, oxygen, nitrogen and hydrogen analyzer, as a key analytical tool, plays an important role in scientific research and industrial production. Its continuous technological innovation and development trend will help to analyse the elements of oxygen, nitrogen and hydrogen more accurately and efficiently, and promote the development of scientific research and application in related fields.