2-Dimensional GCMS with Cryotrap: Theory and Applications ...

Conventional GC: The elution of Column 2 differs from Column 1.InjectionPortDetectorPeak-of-interestColumn 2GCOven2D-GC: switch the flow from column-1 to column-2 during the time window thatcontains the peak of interest.Cut from the output ofColumn-1 to Column-2.InjectionPortOutput of column-1Peak-of-interestColumn 1Column 2GCOvenSwitchOutput ofcolumn-2Conventional GC: Two columns connected end-to-end gives a mixture of the twodifferent elution orders.InjectionPortDetectorPeak-of-interestColumn 1 Column 2GCOven2D-GC: A narrow the transfer-time window (cut-window) about the peak-of-interestimproves the specificity.Cut from the output ofColumn-1 to Column-2.InjectionPortOutput of column-1Peak-of-interestColumn 1 Column 2GCOvenSwitchOutput ofcolumn-2