Elemental analyzers are indispensable analytical tools for chemical composition analysis. They are used in academia and industry and can be used for the analysis of pure substances or mixtures in order to ascertain the weight percentage of the elements they contain.

The principle of quantitative analysis is to convert the material to be analyzed in the presence of an oxidation catalyst such as copper oxide to complete combustion using oxygen, to convert it into oxides of carbon dioxide, water, nitrogen and nitrogen; and to reduce nitrogen oxides to nitrogen by using copper. Traditionally, two U-shaped absorption tubes are respectively used to fill in magnesium to absorb moisture, and sodium hydroxide absorption tubes distributed on asbestos are used to absorb carbon dioxide. The weight difference between the two absorption tubes before and after the analysis can be measured respectively. Natural water and carbon dioxide. If the natural gas mixture is burned into a potassium hydroxide solution and the volume of nitrogen is measured, the weight percentage of nitrogen can be obtained by using the gas law. The above conventional method requires a relatively large amount of sample, and the manipulation is time-consuming. It has been automated. Replaced by analytical methods.

The analysis method of this instrument is to use vertical combustion tubes. The substances to be analyzed are contained in a tin metal container and placed on an automatic sample feeder. Using the principle of gravity, a combustion tube of about 1150° C. is periodically added, and the combustion tube is used under the combustion of tin. The sample combustion temperature is as high as 1800°C to promote the complete combustion of the sample. After the copper reduction treatment, the natural N2, CO2, and H2O mixture is separated by a special separation tube, and the content can be determined using a thermal conductivity detector (TCD). The data processor calculates the weight percentage of carbon, hydrogen, and nitrogen automatically.