Comparison of Separation Performance with Various Carrier Gases and Introduction of Gas Selector

Helium (He) is the most widely used carrier gas in gas chromatography (GC), but alternative carrier gases have been in demand in response to recent He supply shortages. When switching to an alternative carrier gas, it is necessary to select a carrier gas according to a critical separation required in analysis as separation performance depends on the type of carrier gas.
In this article, a Grob test mix was analyzed with three types of carrier gases (i.e. He, N2 and H2). In addition, separation performance was investigated with each carrier gas at various linear velocities. A gas selector which enables easy carrier gas switching is also introduced.