A thermal desorption apparatus for sample introduction of gas chromatography with enhanced chemical recovery and enhanced matrix management

摘要

The optimization of the injection rate, matrix management (e.g., water removal), optimization of the recovery of chemical substances in a specific range, and both the desorption system and the GC system can be used for the cleanup of the system, the sample may be used with multiple column GC or GC \/ MS systems A system for thermal desorption is described.Reverse the flow through the first column (332) in the GC, facilitating the operation of the GC and removal of excess condensed water and heavy chemicals that may affect the background.By eliminating the flow through both the thermal desorption device (320) and the first column (332) in the GC during preheating of the sample, it can correspond to the pre expansion of the sample, or otherwise cause prior emission to the active carrier gas flow in other systems.Simple maintenance achieved by replacing the release liner 322 and the first GC column 332 avoids the transfer line and the rotary valve to improve the performance and lifetime of the system.