The development of industrialization has led to the complexity of sample properties faced by modern analytical chemistry, which has brought about problems with development
The question has a certain impact on people's lives, and food safety and environmental conditions have become increasingly important goals of concern. How to quickly and accurately address these issues
Accurately monitoring and testing samples is a constant problem faced by the analytical instrument industry. Thermal desorption, also known as thermal desorption, is the use of relatively inert materials by heating
The neutral gas directly extracts the components to be tested from solids and liquids and sends them into a gas chromatography column. Secondary thermal desorption refers to the group that undergoes thermal desorption
Focus again on the secondary cold trap, then quickly heat the cold trap to decompose and extract the components, which are then sent to the gas chromatography column to become high-resolution capillary
Chromatographic peaks compatible with tube gas chromatography. The main function of secondary thermal desorption is to eliminate component chromatographic peak overlap caused by direct desorption of sample tubes
Due to issues such as broadening and low desorption efficiency, desorption rate has become a key indicator for secondary thermal desorption.
Traditional secondary thermal desorption is achieved through the use of a heating and cooling trap, which rapidly rises from low temperature (-30 ℃) to desorption temperature
Degrees always require time, and there are temperature gradient issues. The actual temperature inside the cold trap tube may not necessarily be the controlled temperature. And adopt the instantaneous desorption technology of hot air flow
The AutoTD A automatic thermal desorption instrument eliminates the influence of heating rate and temperature gradient, improves desorption efficiency, and thus eliminates heat
The difference in chromatographic peak shape between desorption injection and direct injection, and compatibility with capillary gas chromatography.