Dolomite, in collaboration with the UK's National Centre for Atmospheric Science, has successfully tested the miniaturisation of gas-chromatography equipment for environmental testing.
The glass Gas Chromatography Chip has a 300um thick layer and is fabricated with isotropic channels, which effectively replace the capillary and spindle structure commonly used in standard GC columns.
This microfluidic miniaturisation enables the production of portable, robust and low-power GC systems suitable for environmental applications such as atmospheric monitoring.
The chip design includes an injection zone that allows activated carbon particles to be loaded and held, forming a sample absorption column.
Closely packed within a 100 x 100mm microfluidic chip, the 7.5m- and 1.4m-long channels have an internal diameter of 320um to ensure efficient heat transfer.
With a circular cross section, a uniform coating can be evenly applied to the inside surface of the channel, effectively mimicking the stationary phase, to aid separation.
The results have been published in the Journal of Chromatography.
