Discharge ionization detector

A discharge ionization detector (DID) is a type of detector used in gas chromatography.

Principle

A DID is an ion detector which uses a high-voltage electric discharge to produce ions. The detector uses an electrical discharge in helium to generate high energy UV photons and metastable helium which ionizes all compounds except helium.[1] The ions produce an electric current, which is the signal output of the detector. The greater the concentration of the component, the more ions are produced, and the greater the current.

Application

DIDs are sensitive to a broad range of components. In Air Separation plants they are used to detect the components CO; CH2; C+; N2; O2 in Argon product in ppm range.

DIDs are non-destructive detectors. They do not destroy/consume the components they detect. Therefore, they can be used before other detectors in multiple-detector configurations.

DIDs are an improvement over Helium ionization detectors in that they contain no radioactive source.

gollark: https://pastebin.com/MWE6N15i now functions as a utility for bundling multi-file programs into one convenient image.
gollark: Also, a minifier written in Lua?
gollark: Also, anyone know of some simple-to-use compression thing?
gollark: `fs.list` definitely works now.I'd like to note that it's not *quuuuuite* compatible with the actual FS API (even ignoring `fs.find`) but should mostly work.
gollark: https://pastebin.com/MWE6N15iA partial reimplementation of the FS API using an in-memory disk image. Mostly untested.

References
  1. http://www.cesstech.com.my/data/products/Gas/Gas_Chromatograph_GowMac%20Brochure/Gow-Mac%20590.pdf


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