Gas Chromatography

Creating a smooth thermal gradient along a separation column is a challenging task. A ‘Flow-Field’ is achieved by placing a flow resistance between an air fan and the helical channels and heated capillary sheath. Thermal loss of the resistively heated separation column is dependent on the air flow velocity. This forms the basis of the HyperChrom thermal gradient GC.

Flexible programming of both the air flow and heating current allows control of the temperature and magnitude of the thermal gradient. This new degree of freedom enables novel measurement methods.

Temperature & Gradient Programming

Temperature curve is programmed on a seconds scale as opposed to the minutes scale of conventional GC. Multiple ramps, iso-thermal phases and even negative ramps are possible. The temperature gradient can be increased or decreased depending on the requirements.

Peak Focusing


In classical GC, peaks are broadened by diffusion. This effect is counteracted by our innovative peak focusing. This is achieved by the thermal gradient applied on the separation column. The thermal gradient creates a velocity gradient within the separation column where the front is slower than the tail. Consistent Gaussian-form peaks are achievable with FF-TG-GC! Drastically reduced elution temperatures are advantageous when analysing unstable substances. Lower operating temperatures also extend the column’s lifetime and stability.