- Porous divinylbenzene homopolymer
- A PLOT column with polarity between Porapak-Q and Porapak-N
- Separates ethane, ethylene and ethyne (acetylene)
- Not recommended for quantification of polar compounds
- Minimal conditioning time required — one hour
Note: GS-Q has proved useful for separations of various gases, including freons and sulfides (except for SO2). Although GS-Q is not suitable for quantitating water or alcohols, aqueous injections will not harm the column.