Wednesday, July 4, 2018

Gas chromatography detectors types

GC Detectors can find identity and concentration of analytes. Selective, non-selective and specific are the nature of GC detectors. The non-selective detectors are responding to all components present in a carrier gas, selective have a response to a variety of compounds with the same chemical characteristics and specific detectors are the response to a specific compound. Flame ionization detector (FID) and Thermal conductivity detector (TCD) are the most commonly used detectors both are sensitive to a large range of components, FID is highly sensitive and robust than the TCD.FID no response to inorganic gases and TCD are a response to inorganic gases such as N2, CO, NH3, CO2, CS2, etc.
There are numbers of detectors are used for gas chromatography let’s check it.
  • Flame ionization detector: (FID)
  • Thermal conductivity detector: (TCD)
  • Nitrogen phosphorous detector: (NPD)
  • Photo ionization detector: (PID)
  • Electron capture detector: (ECD)
  • Flame photometric detector: (FPD)
  • Electrolytic conductivity detector: (ECD)
  • Mass spectrometer: (MS)

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