Thermal Modulation Interface between Supercritical Fluid Extraction andSupercritical Fluid Chromatography

摘要

A thermal modulator that can act as an interface between supercritical fluidextraction and supercritical fluid chromatography was developed and tested. The modulator was made of a short segment of a fused-silica capillary column, which was coated on the outside with electrically conductive paint so that it could be heated rapidly by a pulse of electric current. An equivalent of an injection is made internally within a flowing stream containing the sample by alternately heating and cooling the modulator, rather than by introduction through an injection port or a valve.