Solute focusing technique for on‐column injection in capillary gas chromatography

A novel solute focusing technique for on‐column injection of liquid samples onto capillary GC columns is described. The focusing technique allows injection of 8.0 microliters or more of sample without producing the peak distortion or splitting observed under conventional on‐column injection conditions. The experimentally determined performance of the technique is given for a wide volatility range sample. Solute focusing is useful in situations where on‐column injection of 1.0 microliter or greater is required.