There still appears to be a place for selective detectors provided that they can offer specific advantages. Early versions of most of the detectors described appeared 30 or more years ago and have survived by constant modifications and improvement in design and performance. In the light of this and the fact that just about every conceivable property of gas mixtures has been exploited over the years it is difficult to envisage any great new advance.

Many detectors have specific advantages for particular applications. The PID only requires one gas supply which makes it suitable for portable equipment. A laboratory monitoring the amount of stench-ing agents in natural gas is hardly likely to abandon the simplest form of FPD for anything more sophisticated. The ECD reigns supreme in the field of poly-halogenated compounds and the O-FID is ideally suited for the purpose that it was designed for. As speed of analysis increases, detectors are required with very fast response time and low dead volume leading to devices such as time-of-flight mass spectrometers. It would appear that in spite of nearly 50 years of continuous development there is still room for further advances in detectors.

See also: N/Chromatography: Gas: Column Technology; Detectors: General (Flame Ionization Detectors and Thermal Conductivity Detectors); Detectors: Mass Spectrometry. III/Environmental Applications: Gas Chromatography - Mass Spectrometry. Fungicides: Gas Chromatography; Herbicides: Gas Chromato-graphy; Pesticides: Gas Chromatography; Petroleum Products: Gas Chromatography. Appendix 2: Essential Guides to Method Development in Gas Chromatography.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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