Organic Elements Analyzer Encyclopedia
Organic Element Analyzer
Organic Element Analyzer Measurement Principle
After combustion of the sample, the product passes through specific reagents to form CO2, H2O, N2, and nitrogen oxides. At the same time, the reagent removes some interfering substances, such as halogens, S, and P. The gas then enters the reducing tank and reacts with the copper to remove excess oxygen and reduce the nitrogen oxides to N2. Finally, it enters the mixing chamber and homogenous mixing takes place at normal temperature and pressure.
The uniformly mixed gas passes through three groups of highly sensitive thermal conductivity detectors, each of which contains a pair of thermal conductivity cells. An H2O trap is installed between the first two thermal conductivity cells. The signal difference between the thermal conductivity cells is proportional to the content of H2O, and is a function of the hydrogen content in the original sample, so as to measure the content of H in the sample. The next two thermal cell chambers were CO2 traps used to measure C, and finally N was measured using pure He as a reference.
The method of determining S and O is basically the same as that of CHN, and you only need to change the reagent. The sulfur was burned and measured separately as SO2. Oxygen is also measured separately. The sample reacts with platinum carbon to generate CO after pyrolysis in a pure helium atmosphere, and after further oxidation to CO2, it is detected by a thermal conductivity cell and finally the oxygen content is calculated. Separate measurement can ensure the measurement effect of O and S and the optimal reagent dosage, so as to ensure the accuracy of the analysis result.
Application of organic element analyzer
Elemental Analyzer is a kind of laboratory routine instrument that can quantitatively analyze the contents of C, H, N, S and O elements in organic solids, highly volatile and sensitive substances, and studies organic and organic compounds. The elemental composition and other aspects play an important role. Can be widely used in chemical and pharmaceutical products, such as fine chemical products, pharmaceuticals, fertilizers, petrochemical products carbon, hydrogen, oxygen, nitrogen content, thereby revealing changes in the nature of compounds, get useful information, is an effective means of scientific research:
