As solutes elute from the column, they interact with the detector. The detector converts this interaction into an electronic signal that is sent to the data system. The magnitude of the signal is plotted versus time (from the time of injection) and a chromatogram is generated.

Some detectors respond to any solute eluting from the column while others respond only to solutes with specific structures, functional groups or atoms

Detectors that exhibit enhanced response to specific types of solutes are called selective detectors.

Most detectors require one or more gases to function properly. There are combustion, reagent, auxiliary and makeup gases. In some cases, one gas may serve multiple purposes. The type of detector gas is dependent on the specific detector and is fairly universal between GC manufacturers. The flow rates for each type of detector varies between GC manufacturers. It is important to follow the recommended flow rates to obtain the optimal sensitivity, selectivity and linear range for a detector

Gas chromatography detectors /

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