Gas Chromatography Mass Spectrometry (GC-MS):
GC is the separation technique of choice for smaller and volatile molecules such as benzenes, alcohols and aromatics, and simple molecules such as steroids, fatty acids and hormones. It is widely used for chemical analysis, and especially for drug and environmental contamination testing.
When combined with MS, GC/MS can be used in both full scan MS or select ion monitoring (SIM) mode to cover either a wide range of m/z ratios or to gather data for specific masses of interest, respectively.
Thermo has the Single Quadrupole, Triple Quadrupole and Exactive GCMS as well as GCMS/MS for various applications.