Supercritical fluid extraction coupled to analytical chromatography system

摘要

The present invention is a collection system for use with supercritical fluid extraction. The system comprises a device for collecting analyte from a fluid having the same. There is also a restrictor for controlling flow of analyte to the collecting device. The restrictor converts the fluid with analyte from a first pressure to a second pressure. The second pressure is less than the first pressure. The first pressure is a supercritical pressure. The restrictor is in fluidic communication with the collecting device. There is also a device for deabsorbing the analyte from the collecting device. The deabsorbing device is in fluidic communication with the collecting device. The collection system also includes a chromatograph for analyzing the analyte. The chromatograph is in fluidic communication with the collecting device to receive deabsorbed analyte. The chromatograph is remote from the collecting device. The chromatograph can be either a gas chromatograph or a liquid chromatograph. In one embodiment of the collection system, the deabsorbing device backflushes deabsorbing fluid through the collecting device into the chromatograph. That is, the flow of fluid during deabsorbing is in an opposite direction to the flow of fluid during collection. Alternatively, the deabsorbing device foreflushes the deabsorbing fluid through the collecting device into the chromatograph. That is, the flow of fluid during deabsorbing is the same direction as the flow of fluid during collection.