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How to study the relationship between the composition, structure and physical and chemical properties of the cracked products and the original samples through thermal cracking gas chromatograph?

Publish Time: 2024-04-23
Thermal cracking gas chromatograph is a commonly used technique to study the relationship between the composition, structure and physical and chemical properties of materials and the original sample. The basic principle is to rapidly heat and crack the sample at high temperature into gaseous products, which are then separated and detected by a gas chromatograph.

The following are the steps to study the relationship between cracking products and original samples through thermal cracking gas chromatograph:

Sample pretreatment: First, the sample needs to be properly pretreated, including crushing, uniform mixing, etc., to ensure the representativeness and reliability of the sample.

Sample pyrolysis: Put the pretreated sample into a thermal cracker and crack it into gaseous products through rapid heating. The lysis temperature and lysis time can be adjusted according to the nature of the sample and the purpose of the study.

Gas chromatography analysis: The pyrolysis products enter the gas chromatograph for separation and detection. In a gas chromatograph, the cleavage products are separated into their various components, detected and quantified by a detector.

Data processing: The data obtained from the analysis include information such as the composition and relative content of the cleavage products. By comparing the gas chromatogram of the cleavage product with that of the original sample, the origin and structure of the cleavage product can be determined.

Combining other techniques: In order to more comprehensively study the relationship between the cleavage products and the original sample, other analytical techniques can be combined, such as mass spectrometry, infrared spectrometry, etc., to further determine the chemical structure and physical properties of the cleavage products.

Through the above steps, the thermal cracking gas chromatograph can effectively study the relationship between the composition, structure and physical and chemical properties of the cracked products and the original sample. This is of great significance for understanding the decomposition mechanism of materials, optimizing material properties, and developing new materials.
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