ABSTRACT
A device that monitors the presence of a solute as it leaves the chromatographic system is an essential adjunct to all chromatography instruments. In fact, without it, chromatography would have a very limited performance and a very restricted field of application. The monitoring device has been given the general term detector, which encompasses all types of mobile phase monitoring instruments ranging from the relatively simple flame ionization detector (FID) used in gas chromatography (GC), to very sophisticated spectrometric equipment such as the mass spectrometer.
