Thermogravimetric analyzer is a kind of instrument used to detect the relationship between temperature and mass of substances by thermogravimetric method, which is widely used in scientific research, material testing and other fields. This paper will introduce the measuring object, principle, operation steps and precautions of the thermogravimetric analyzer in detail.
1. Measurement object of thermogravimetric analyzer
Thermogravimetric analyzer can measure a variety of substances, including solids, liquids, powders, films, etc., as well as a variety of chemical substances, such as organic matter, inorganic matter, polymer materials, etc. By measuring the mass change of these substances during the heating process, information such as their thermal and thermochemical properties can be obtained.
Second, the principle of thermogravimetric analyzer
The principle of thermogravimetric analyzer is based on the mass change of the substance when it is heated, and the thermal properties and chemical reactions of the substance are analyzed by measuring the mass change curve. When the substance is heated, it will undergo sublimation, decomposition, REDOX and other reactions, resulting in a change in quality. Through the measurement and analysis of these mass changes, information such as thermal properties and chemical reactions of substances can be obtained.
Third, the operation steps of the thermogravimetric analyzer
Sample preparation: Select the appropriate sample according to the substance to be tested and weigh it.
Instrument setting: Select the appropriate measurement conditions according to the substance to be detected, including heating rate, termination temperature, gas atmosphere, etc.
Loading: Place the sample into the sample tray of the thermogravimetric analyzer.
Start measuring: Start the thermogravimetric analyzer and start measuring the temperature-mass change curve of the substance.
Data processing and analysis: The measured data are processed and analyzed to extract information such as thermal properties and chemical reactions of substances.
Fourth, the use of thermogravimetric analyzer precautions
Sample selection: The appropriate sample should be selected according to the substance to be tested to ensure the stability and representativeness of the sample.
Instrument operation: The instrument should be operated in strict accordance with the operating procedures to avoid damage to the instrument or measurement errors caused by misoperation.
Laboratory safety: Attention should be paid to laboratory safety to avoid sample hazards or damage to the environment and human body.
Thermogravimetric analyzer is an important analytical instrument, which can measure the thermal properties and chemical reactions of substances, and is widely used in scientific research, material testing and other fields. In this paper, the measuring object, principle, operation procedure and precautions of thermogravimetric analyzer are introduced in detail. Through the correct use of thermogravimetric analyzer, accurate measurement results can be obtained, providing strong support for scientific research and production.