pegasus4dThe LECO Pegasus 4D GCxGC-TOFMS system provides a snificant increase in chromatographic resolution for petroleum analyses across a wide volatility range.Consult LECO's entire Pegasus BT 4D catalogue on . Page: 16. ® Quantitative Analysis Using the PEGASUS BT 4D By leveraging GC×GC’s superior chromatographic