Basic description of the gas chromatograph

The gas chromatograph (GC) has in principle three parts the injector (inlet system), the oven with the analytical column, and the detector. Detailed descriptions of each of these parts can be found in dedicated literature [e.g. 29, 35] and may vary for different GC models. 

Detector type Abbrev. Sensitivity in g of sample Type of selectivity 

Electrolytic conductivity Hall 10 ° to 10 halogen, sulfur, nitrogen 

Mass selective MSD instr. dependent qualitative and quantitative 

There are several important characteristics of a good detector sensitivity, dynamic range, stability, and for specific ones selectivity. Sensitivity should be in fact characterized by two parameters the ratio of the detector response to the amount of sample (sensitivity slope) and the minimum detectable level of a given compound (commonly measured for a signal to noise ratio of 3). The dynamic range is the range 

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