The GC-MS is consist of two components

The GC-MS is consist of two components: the gas chromatograph and the mass spectrometer. The gas chromatograph utilizes a capillary column which depends on the column’s dimensions (length, diameter, film thickness) as well as the phase properties (e.g. 5% phenyl polysiloxane). The separation of the different molecules within a mixture depend on the chemical properties between these molecules and on their relative affinity for the stationary phase of the column during the pass of the sample along the column. The molecules are retained and then elute from the column at different times (called the retention time), downstream the mass spectrometer capture, ionize, accelerate, deflect, and detect the ionized molecules separately by breaking each molecule into ionized fragments and detecting these fragments using their mass-to-charge ratio