Topics - Silica Column
In chromatography silica columns usually refer to a fused silica capillary columns
which are used as gas chromatography columns. Fused silica capillary columns are drawn in a very similar manner to quartz optical fibers using an argon arc furnace. The fused silica column evolved from the rigid soft glass capillary column originally invented by D.H.Desty but silica columns are far stronger and considerably less active and, as opposed to presently available soft glass columns, are extremely flexible. Fused silica capillary columns can range in length from a few meters to hundreds of meters and from an ID of 50 micron to an ID of several hundred micron. At one extreme, fused silica columns can produces separations in milliseconds and, at the other, provide columns of several million theoretical plates which may have elution times of many hours. 90% of modern GC analyses are carried out on fused silica columns.