pegasus4dConsult LECO's entire Pegasus BT 4D catalogue on . Page: 16. ® Quantitative Analysis Using the PEGASUS BT 4D By leveraging GC×GC’s superior chromatographicLECO's Pegasus 4D is a comprehensive two dimensional Gas Chromatograph Time-of-Flht mass spectrometer. Comprehensive two dimensional gas chromatography (GCxGC) allows