A micro gas chromatography column fabricated by ultrafast laser-assisted chemical etching

A semi-packed gas chromatographic column with staggered elliptic cylindrical post arrays

“…This system was integrated into a micro chromatographic column with a 1.25 m long, 200 μm wide, and 30 μm deep spiral channel rectangular cross-section channel. This μGCC could separate nitrogen, pentane, and hexane with efficiencies of 1500 plates per m. 5 Since then, the structure, [6][7][8] substrate material, [9][10][11] and stationary phase 12,13 of micro gas chromatographic column have been studied.…”

Micro gas chromatography column coated with ionic liquid/metal–organic framework composites as the stationary phase

“…In order to realize enhanced separation performance within a certain length, efforts are mainly paid to the optimization of column structure and stationary phase for the µGC. In terms of structure, works are carried out on the geometric shape of the flow channel [9][10][11][12][13][14] and the substrate material [9,14,15]. In terms of stationary phase, alumina [16], carbon nanotubes [17], polydimethylsiloxane [18], and mesoporous silica [19] have been studied.…”