HyperChrom - Gas Chromatography (GC) System - Brochure

The separation column is heated in a thin steel capillary. This is extremely fast and consumes very little energy. The very special feature, however, is the added possibility of using a continuous temperature gradient. With the temperature gradient, the signals are focused and shaped. At the same time the elution temperatures are greatly reduced. The temperature gradient is generated by an ingeniously simple trick. The heated capillary lies in a flow field which is generated in such a way that the flow velocity increases continuously. Thus, the inlet of the separation column is hotter than the outlet. While the principle is simple, many technological challenges have had to be solved before this process worked as stably as conventional oven GCs.