Techniques What is GCxGC? Comprehensive two-dimensional (2D) gas chromatography, commonly known as GCxGC, separates a sample using two chromatographic columns with different properties, run in tandem. Details What is Time-of-flight mass spectrometry (TOF MS)? How does TOF MS work? How does TOF MS differ from quadrupole MS? Can you use soft ionisation methods with TOF MS? What are the applications of TOF MS? Learn more here Details