Thermal desorption, also called thermal desorption, is the use of a relatively inert gas in a heated manner to directly extract solids and components from a liquid and send them to a gas chromatography column. The secondary thermal desorption is to refocus the thermally desorbed components to the secondary trap, and then rapidly heat the trap to decompose and extract the group and send it to the gas chromatography column to make it compatible with high resolution capillary gas chromatography. peak. The main function of secondary thermal desorption is to eliminate the problem of overlapping, broadening, and low desorption of chromatographic peaks caused by the direct desorption of the sample tube. The desorption rate becomes a key indicator of secondary thermal desorption.
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