pegasus 4dComprehensive Two-Dimensional Gas Chromatography with Time-of-Flht Mass Spectrometer GCxGC, combined with the Pegasus HT-C TOFMS, changes the dynamic when analyzingComprehensive Two-Dimensional Gas Chromatography with Time-of-Flht Mass Spectrometer GCxGC, combined with the Pegasus HT-C TOFMS, changes the dynamic when analyzing