Gas Chromatography Detectors - Closing Notes > Page 96


Of the four, the FID is the most versatile, sensitive and linear, and should be the first to be considered when facing the challenge of a new, and hitherto unknown sample containing unfamiliar substances. Nevertheless, specific and unusual samples can demand special detecting conditions particularly for certain environmental and forensic analyses and one of the several specific detectors described may well be found more appropriate. Fortunately, there is a fairly wide range of specific GC detectors that are commercially available.

It will be interesting to see how the various detecting systems based on the different helium ionization processes fare commercially over the next few years. It will also be interesting to see if any of them displace one of the 'popular four' although, from there performance characteristics reported so far, this does not appear very likely. Of course, a completely new sensing system could be invented any time, and there is still a need for new and better detectors. However, taking into account the detector developments that have occurred over the past 20 years this, the introduction of completely novel detecting systems, also, does not appear very likely.