High-speed cryo-focusing injection for gas chromatography: Reduction of injection band broadening with concentration enrichment

► High-speed cryo-focusing injection system made from a short section of MXT column. ► Produced peaks 6.3 ms wide at half height. ► Injected mass limits of detection in the low picogram range. ► Achieved a total peak capacity of 460 peaks during 3 min GC separation.